Wednesday

May 27, 2015

May 27, 2015

**Trig**

Use the given information to evaluate sin (a-b). Exact answers. No decimals. Sin a = -7/25, cot b = 8/15; neither a nor b are in quadrant III.
*Wednesday, May 7, 2014 at 12:46pm*

**Trig**

Use the given information to evaluate sin (a+b). Exact answers only. No decimals. Tan a = 4/3, cos b ='-12/13; neither a nor b are in quadrant III.
*Wednesday, May 7, 2014 at 12:42pm*

**Trig**

Simplify each expression using fundamental identities. 1. Sin theta cot theta 2. 1-sin^2 theta / cos theta
*Wednesday, May 7, 2014 at 12:37pm*

**trig**

a carousel has eight evely spaced seats shaped like animals. During each ride, the carousel makes between 8 and 9 clockwise revolutions. At the end of one ride, the carousel stops so that the lion is in the position where the zebra was when the ride started. through how many ...
*Wednesday, May 7, 2014 at 12:03pm*

**trig**

On an inclined road, which makes an angle of 25 degrees with the horizontal plane, stands a vertical tower. At a point Q, 150 ft from the base of the tower down the road, the angle of elevation to the top of the tower is 65. How high is the tower?
*Tuesday, May 6, 2014 at 11:58pm*

**trig**

Find all points of intersection of the polar curves r= 2 + 4cos theta and r= 6cos theta. Please explain in detail.
*Tuesday, May 6, 2014 at 3:30pm*

**Trig**

Given sin θ = −1/2 and sec θ > 0, find the exact value of tan 2θ. Radical 3 Radical 3/2 Negative radical 3 Negative radical 3/2
*Saturday, May 3, 2014 at 7:29pm*

**Trig**

Given sin x = 5/13 and 0 < x < pi/2 find the value of sin(π − x). 12/13 5/13 -12/13 -5/13
*Saturday, May 3, 2014 at 7:28pm*

**trig**

A soccer ball is placed 12 ft away from a goal post that measures 8ft high. You kick the ball and it hits the crossbar at the top of the goal. What was the angle of elevation of your kick?
*Thursday, May 1, 2014 at 5:08pm*

**Trig. Math**

A circle of radius 2 inscribed in a right triangle. Find the simplest expression possible for the triangle's area as a function of its hypotenuse.
*Thursday, May 1, 2014 at 3:57pm*

**Trig functions**

The average depth of the water in a port on a tidal river is 4m. At low tide, the depth of the water is 2m. One cycle is completed approximately every 12h. a)Find an equation of the depth, d(t)metres, with respect to the average depth, as a function of the time, t hours, after...
*Wednesday, April 30, 2014 at 8:55pm*

**trig**

On a typical day at an ocean port, the water has a maximum depth of 18m at 6:00 am. The minimum depth of 9m occurs 6.8 hours later. Write an equation to describe the relationship between the depth and time.
*Tuesday, April 29, 2014 at 11:25pm*

**Trig**

What is the sum of the arithmetic series where n=50 , t1=9 and t2=331
*Tuesday, April 29, 2014 at 5:01pm*

**Trig**

What is the sum of the arithmetic series where n=100 , t1=7 and t2=205
*Tuesday, April 29, 2014 at 4:59pm*

**Trig **

Find the 20th term of an arithmetic sequence with a=1 and d=1/2
*Tuesday, April 29, 2014 at 4:53pm*

**Trig**

Find the 6th term of the arithmetic sequence with a9=120 and a14=195
*Tuesday, April 29, 2014 at 4:51pm*

**Integrated Trig**

How many years will it take for an initial investment of $5,000 to double if it is invested at a rate of 3% compunded continuously? Compounded annually?
*Monday, April 28, 2014 at 2:16pm*

**Trig**

Write a quadratic equation whose roots are 5 + i radical 2 and 5 – i radical 2 ____ x^2 + _____ x+ ______=0
*Saturday, April 26, 2014 at 4:37pm*

**Trig**

If sec A =5/4 and A is an angle in Quadrant IV, find the value of cos A. A. -4/5 B.4/5 C.-5/4 Is it choice A
*Saturday, April 26, 2014 at 4:32pm*

**trig**

16cos(x)-3sec(x)=0 Find all solutions for x in [0, 2pi)
*Wednesday, April 23, 2014 at 11:56pm*

**trig**

if the balloon is currently floating 60 feet in the air (measure from the bottom of the basket) , what is the approximate angle of depression of the person in the basket?
*Wednesday, April 23, 2014 at 9:27pm*

**TRIG**

Half angles in trig (square root(1-square root(21)/5)/2)
*Tuesday, April 22, 2014 at 10:14pm*

**Inverse Trig**

Using -pi/2 ≤ y ≤ pi/2, what are the following solutions? y=arcsin root3/2 y=arcsin 1/2
*Monday, April 21, 2014 at 5:44pm*

**Inverse Trig**

What is the general solution to y = arcsin 0?
*Monday, April 21, 2014 at 5:41pm*

**Inverse Trig**

How do I simplify arcsin (sin 6 pi) given the interval 0 ≤ theta < 2pi
*Monday, April 21, 2014 at 5:40pm*

**Inverse Trig**

What is the general solution to y = arcsin 1?
*Monday, April 21, 2014 at 5:39pm*

**Trig Maths**

solve the equation 5sin(θ -pi/6)=8cosθ for values of 0<=θ <=2pi
*Sunday, April 20, 2014 at 11:07am*

**Trig Maths**

solve the equation 5sin(θ -pi/6)=8cosθ for values of 0<=θ <=2pi
*Sunday, April 20, 2014 at 11:04am*

**trig**

a 725 pound trailer is sitting on a ramp inclined at 36 degrees. how much force is required to keep the trailer from rolling down the ramp??
*Wednesday, April 16, 2014 at 10:25pm*

**Trig**

Force 1= 65 pounds , Force 2=90 pounds find the angle between the forces? magnitude of the resultant force= 70lbs
*Wednesday, April 16, 2014 at 10:11pm*

**Trig**

how do you find the standard form of 7(cos255degrees + isin255degrees) ?
*Tuesday, April 15, 2014 at 8:08pm*

**Geometry- trig ratio**

An observer (o) spots a plane flying at a 55 degrees angle to his horizontal line of sight. if the plane is flying at an altitude of 21,000 ft, what is the distance (x) from the plane (p) to the observer (o)?
*Tuesday, April 15, 2014 at 7:38pm*

**Trig**

A vertical pole stands on a 20° slope from 50 m down the slope from the pole the angle of elevation of the top of the pole is 35 degrees. How tall is the pole
*Tuesday, April 15, 2014 at 5:40pm*

**Trig**

A vertical tower is on a 12° slope. from a 50 m down the hill, the angle of elevation of the top of the tower is 30°. find the height of the tower
*Tuesday, April 15, 2014 at 4:03pm*

**HELP!**

Next year (sophomore year) I'm taking the following courses: Honors Algebra II/Trig Spanish III Health AP Biology Honors English AP World History Is AP Bio and world history hard? or no it's not just the exam. Please tell me because this is my first year taking AP.
*Monday, April 14, 2014 at 8:00pm*

**trig**

A car is on a driveway that is inclined 12 degrees to the horizontal. A force of 470lb is required to keep the car from rolling down the driveway. a) Find the weight of the car b) Find the force the car exerts against the driveway
*Monday, April 14, 2014 at 3:44pm*

**trig/ vectors**

Points C and D are directly across from each other on opposite banks of a river. A boat travels across the river directly from point c to point d at a speed of 12 mph. If the current of the river has a speed of 4 mph, at what angle, and speed, must the captain head to travel ...
*Sunday, April 13, 2014 at 8:46pm*

**trig**

Given angle x, where 0 <= x < 360 (degrees), cos(x) is equal to a unique value. Determine the value of to the nearest degree. Justify your answer.
*Friday, April 11, 2014 at 10:50am*

**trig**

Given angle x,where 0 <= x <= 360 (degrees) solve for to the nearest degree. a)cos(2x) = 0.6420 b)sin(x + 20) = 0.2045 c)tan(90 - 2x) = 1.6443
*Friday, April 11, 2014 at 10:42am*

**trig**

Given angle x, where 0 <= x < 360 (degrees), cos(x) is equal to a unique value. Determine the value of to the nearest degree. Justify your answer.
*Friday, April 11, 2014 at 10:39am*

**trig**

Given angle x, where 0 <= x < 360 (degrees), cos(x) is equal to a unique value. Determine the value of to the nearest degree. Justify your answer.
*Friday, April 11, 2014 at 10:38am*

**trig**

A and B are positive acute angles. if sin A=4/5 and cos B=8/17 find the value of tan (A-B) is the answer =43/100
*Thursday, April 10, 2014 at 5:26pm*

**trig**

An airplane has air speed of 540 mph and a heading of 50*. The wind is blowing from the north at 27 mph. Find the plane's ground speed and course direction.
*Thursday, April 10, 2014 at 3:57pm*

**trig**

Use standard identities to express sin(2θ+π/3) in terms of sinθ and cosθ
*Thursday, April 10, 2014 at 8:20am*

**trig**

a plane is 50000 ft in the air and 30000 ft from an airport find the angle of depression from the plane to the airport
*Wednesday, April 9, 2014 at 7:02pm*

**algebra 2/trig**

Tina can paint a room in 8 hours, but when she and her friend Emily work together, they can complete the job in 3 hours. How long would it take Emily to paint the room alone?
*Wednesday, April 9, 2014 at 10:34am*

**trig**

cscx+1/cscx cosx = secx+tanx
*Tuesday, April 8, 2014 at 5:06pm*

**maths Pls help trig**

1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[-360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0<B<90 , prove that 4cos2B+3sin2B=4 4.Prove ...
*Tuesday, April 8, 2014 at 11:01am*

**MathS triG**

1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[-360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0<B<90 , prove that 4cos2B+3sin2B=4 4.Prove ...
*Tuesday, April 8, 2014 at 10:51am*

**Math - Int Trig**

Given the functions: f(x)=2x+2 g(x)=3/x^2+2 h(x)=sqrt(x-2) Find the following 1) (f∘g)(-5) 2) (h∘g)(3) 3) (g∘h)(-2) 4) (g∘g)(-2) 5) (f∘h)(12) Find the following and state the domain: 6) h∘g 7) f∘g 8) g∘f 9) g∘g 10)g∘h
*Thursday, April 3, 2014 at 7:43pm*

**trig**

Help! Ships A and B leave port at the same time and sail on straight paths making an angle of 60 degrees with each other. HOw far apart are the ships at the end of 1 hour if the speed of ship A is 25 km/h and that of ship B is 15 km/h?
*Wednesday, April 2, 2014 at 6:18pm*

**trig**

a hot air balloon climbs continuously along a 30° angle to a height of 5,000 feet. To the nearest tenth of a foot, how far has the balloon traveled to reach 5,000 feet? Draw a sketch and then solve.
*Tuesday, April 1, 2014 at 5:51pm*

**trig**

The ferris wheel in an amusement park. It has a diameter of 24m, and it takes 40s to make one complete revolution. If Peter gets on a gondola which is vertically below the centre of the ferris wheel, find his rise in the height after 5s.
*Monday, March 31, 2014 at 8:54am*

**Trig**

If 0 ≤ x ≤ 2π, which equation is a line of symmetry for the graph of y = cos x? x = 0 x = 2π x = π y = 0
*Sunday, March 30, 2014 at 1:04am*

**Trig**

On the same set of axes, sketch and label the graphs of the equations y = cos 2x and y = –2 sin x in the interval 0 ≤ x ≤ 2π. How many values of x in the interval 0 ≤ x ≤ 2π satisfy the equation –2 sin x – cos 2x = 3? A.1 B.2 C....
*Sunday, March 30, 2014 at 1:03am*

**Trig**

In ΔABC, a = 19, c = 10, and m∠A = 111. Which statement can be used to find the value of C?
*Saturday, March 29, 2014 at 9:52pm*

**Trig**

What is the total number of solutions for the equation 3 tan^2 A + tan A – 2 = 0 in the interval. 0 ≤ A ≤ π?
*Saturday, March 29, 2014 at 9:51pm*

**Trig**

If the period of a cosine function is 1/3 what is the frequency of the function?
*Saturday, March 29, 2014 at 9:50pm*

**trig**

A plane is flying due south at a speed of 192 mph. a wind is blowing in at 53 degrees at 13 mph. what is the bearing of the plane?
*Thursday, March 27, 2014 at 10:09am*

**Trig Identities**

Explain why Sin of theta= -The square root of 1-cos^2 theta is not an identity, using either graphical or numerical reasoning.
*Tuesday, March 25, 2014 at 6:40pm*

**trig**

tan^2(5x)cos^4(5x) = 1/8 - 1/8cos(20x)
*Monday, March 24, 2014 at 8:32pm*

**trig**

tan^2(5x)cos^4(tx = 1/8 - 1/8cos(20x)
*Monday, March 24, 2014 at 8:32pm*

**trig**

Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c. i have sin theta as ...
*Monday, March 24, 2014 at 1:29pm*

**Trig - sum and difference formulas**

Write the expression as a single trigonometric functions: cos 6x cosx - sin6x sin x if you could do it step by step? also... How do I prove that sin(90deg + theta) = cos(theta)?? also step by step so i may learn?
*Monday, March 24, 2014 at 12:21am*

**Trig**

The number of values in the interval –π ≤ x ≤ π that satisfy the equation sin x = 2 cos x is 1 2 3 4 0
*Sunday, March 23, 2014 at 6:46pm*

**trig**

Suppose that Magnus' blood pressure can be modeled by the following function {{{p(t)=83-18sin(71pi*t)}}} Magnus' blood pressure increases each time his heart beats, and it decreases as his heart rests in between beats. In this equation, p(t)is the blood pressure in ...
*Sunday, March 23, 2014 at 7:05am*

**trig**

cos/sin use 2npi and tan uses npi, but how do you know when to add 2npi or npi to the solution of the equation?
*Wednesday, March 19, 2014 at 9:32pm*

**math trig**

a triangle has a measured of hypoteneuos 15 and an adjacent of 10 solve for the triangle.
*Wednesday, March 19, 2014 at 7:03pm*

**math trig**

verify the identities COSX OVER 1PLUS SINX PLUS 1PLUS SINX OVER COSX IS EQUAL TO 2SEC.
*Wednesday, March 19, 2014 at 7:00pm*

**math trig**

a triangle abc has a mearsure of an adjacent 15 and 25 degree solve for the triangle
*Wednesday, March 19, 2014 at 6:54pm*

**trig**

Find all angles, 0≤A<360, that satisfy the equation below, to the nearest 10th of a degree. 2tanA+6=tanA+3
*Sunday, March 16, 2014 at 9:16pm*

**Math ( trig )**

If a person on the Ferris wheel is 45 feet above the ground. The Gris wheel has a radius of 47.f and is 5 feet above the ground. At what degrees had the Ferris wheel rotated counted clockwise?
*Wednesday, March 12, 2014 at 3:59pm*

**trig**

a kite is flying at an angle of elevation of about 40 degrees. all 80 meters of string have been let out. ignoring the sag in the string, find the height of the kite to the nearest 10 meter
*Sunday, March 9, 2014 at 11:15pm*

**math trig**

A TOWER AND A MONUMENT STAND ON A LEVEL PLANE.THE ANGLES OF DEPRESSION OF THE TOP AND BOTTOM OF THE MONUMENT VIEWED FROM THE TOP OF THE TOWER ARE 13DEGREE AND 31 DEGREE,RESPECTIVELY;THE HEIGHT OF THE TOWER IS 145 FT. FIND THE HEIGHT OF THE MONUMENT.
*Sunday, March 9, 2014 at 7:43pm*

**math trig**

two points A and Bare 80 feetapart on the same side of A towerand on a horizontal line through its foot.if angle of elevation of the top of the tower at A is 21 degree and B is 46 degree find the height of the tower.
*Sunday, March 9, 2014 at 7:40pm*

**trig**

three forces
*Sunday, March 9, 2014 at 4:46pm*

**Trig**

A guy wire attached to the top of an electric pole makes a 70deg angle with the level ground. At a point 25 feet from the guy wire (farther away from the pole), the angel of elevation to the top of the pole is 42deg. How long is the guy wire?
*Friday, March 7, 2014 at 4:34am*

**Trig**

Given ∆ABC. If side a is twice as long as side b, is <A necessarily twice as large as <B? Why?
*Thursday, March 6, 2014 at 10:27pm*

**Trig**

A guy wire attached to the top of an electric pole makes a 700 angle with the level ground. At a point 25 feet from the guy wire (farther away from the pole), the angel of elevation to the top of the pole is 420. How long is the guy wire?
*Thursday, March 6, 2014 at 10:26pm*

**trig**

city a is 300 miles directly north of city b assuming the earth to be a sphere of radius 4000 miles determine the difference in latitude of the two cities make answers accurate to the nearest second
*Wednesday, March 5, 2014 at 8:21pm*

**Trig**

A weather balloon is sighted between points A and B which are 5 miles apart on level ground. The angle of elevation of the balloon from A is 37 degrees and it's angle of elevation from B is 58 degrees. Find the height, in feet, of the balloon above the ground.
*Wednesday, March 5, 2014 at 12:52pm*

**Trig**

How do you solve this problem? y = 2sin 3x + 4sin 2x I haven't done these types of problems for awhile and have forgotten how to do them.
*Wednesday, March 5, 2014 at 7:52am*

**Geometry/Trig**

A plane is flying and show an air speed of 130 mi/h. However, there is a 20 mi/hr crosswind. What is the resulting speed of the plane.
*Monday, March 3, 2014 at 12:24am*

**Trig**

given that sinx=3/4 and cosy=-5/13 and both x and y are in quadrant II, find the exact value of cos(x-y)
*Sunday, March 2, 2014 at 5:54pm*

**Trig**

Prove the following: 1/(tanØ - secØ ) + 1/(tanØ + secØ) = -2tanØ (1 - sinØ)/(1 + sinØ) = sec^2Ø - 2secØtanØ + tan^2Ø
*Friday, February 28, 2014 at 9:41pm*

**Trig**

Verify the given equations: ____1______ + ____1_______ = -2 tanθ tanθ – secθ tanθ + secθ 1 – sinθ = sec2θ – 2 secθ tan θ + tan2θ 1 + sinθ
*Friday, February 28, 2014 at 8:53pm*

**trig**

From the foot of a building i have to look upwards at an angle of 22 degrees to sight the top of a tree. From the top of a building, 150 meters above ground level, I have to look down at an angle of depression of 50 degrees to look at the top of the tree. A) How tall is the ...
*Thursday, February 27, 2014 at 1:52pm*

**Alg/Trig**

The angle of elevation from a point on the ground to the top of a tree is 39.8 degrees. The angle of elevation from a point 51.7 ft farther back to the top of the tree is 19.7 degrees. Help find the height of the tree.
*Wednesday, February 26, 2014 at 11:17am*

**trig**

a sailor on a boat 580 metres from the base of a vertical cliff sights the top of a lighthouse with an angel of elevation of 31 degrees
*Wednesday, February 26, 2014 at 8:17am*

**trig**

an=(-1)n+1/2n
*Tuesday, February 25, 2014 at 11:21pm*

**trig**

Use a calculator to find: θ if θ = csc-1 1.7516. θ = _____°. Round to three decimal places.
*Sunday, February 23, 2014 at 5:42pm*

**math12A TRIG pleas help**

a farmer wishes to fence a field in the form of a right triangle.If one angle of the right triangle is 43.2 degree and the hypotenuse is 200yard,find the amount of fencing needed.
*Thursday, February 20, 2014 at 2:10am*

**Trig**

A plane is 48 miles west and 49 miles north of an airport. The pilot wants to fly directly to the airport. What bearing should the pilot take? In degrees and minutes
*Wednesday, February 19, 2014 at 12:09pm*

**Trig**

A straight road slopes upward 14 degrees from the horizontal. A vertical telephone pole beside the road casts a shadow of 60 feet down the road. if the angle of elevation of the sun is 55 degrees, what is the height of the telephone pole?
*Monday, February 17, 2014 at 4:30am*

**Trig**

If f(x)=cos^2x and g(x)=sin^2x, what is (f+g)(pi/15)
*Saturday, February 15, 2014 at 7:29pm*

**trig**

If $5000 is invested at a rate of 3% interest compounded quarterly, what is the value of the investment in 5 years?
*Wednesday, February 12, 2014 at 8:10pm*

**trig**

Given csc theta= 4, cot theta < 0 Find the exact values of cos theta and tan theta
*Tuesday, February 11, 2014 at 9:35pm*

**math - trig**

Why cant we solve an oblique triangle with the Law of Sines if we are given SAS?
*Monday, February 10, 2014 at 8:34pm*

**trig**

City A is 300kilometer due east of city B. city C is 200kilometer on a bearing of 123degree from city B.how far is it from C to A
*Monday, February 10, 2014 at 1:59pm*

**trig**

a central angle intercepts an arc on a circle equal in length to the diameter of the circle. find the measure, in radians, of the central angle.
*Thursday, February 6, 2014 at 3:18pm*