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February 1, 2015

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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trig
earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between earth and mars are the ...
Tuesday, May 27, 2014 at 11:30pm

trig length
To secure a 610-meter radio tower against high winds, guy wires are attached to a ring on the tower. The ring is 7 meters from the top. The wires form a 69o angle with the ground. To the nearest hundredth meter find the length of the guy wire
Tuesday, May 27, 2014 at 9:36pm

trig
A road has a 10% grade (slope). To the nearest degree what is the angle of elevation of the road? should I use sin?
Tuesday, May 27, 2014 at 7:56pm

Trig
You and a friend are rowing a boat 8.5 KPH heading north. A cross current is moving 3.2 KPH at an angle of 38 degrees north of the west direction. How fast are you actually moving and what direction are you actually heading?
Tuesday, May 27, 2014 at 7:30pm

trig
A 15 ft. ladder makes a 35o angle with the side of a house. To the nearest tenth of a foot how high up on the house does the ladder come?
Tuesday, May 27, 2014 at 7:17pm

trig
From a rock ledge the angle of elevation to the topof a treeis 25 degrees. The angle of depression to the bottom of the tree is 10 degrees. Find the heightof the rock ledgeto the nearest tenth and find the height of the tree to the nearest tenth
Tuesday, May 27, 2014 at 10:20am

trig
A kite string is 65 metres long and makes an angle of 32 degrees with the ground. Calculate the height of the kite above the ground to the nearest metre.
Sunday, May 25, 2014 at 5:24pm

math trig
a 3.8m ladder rests against a vertical wall and makes an angle of 38 degrees with the wall. how far does the ladder reach up the wall?
Sunday, May 25, 2014 at 6:58am

trig
Robert is standing on a cliff and looks down at an angle of depression of 62 degrees to look at a boat. The cliff is 76 feet high. How far is the boat from the cliff? Round your answer to two decimal places. The boat is _________ feet from the cliff.
Saturday, May 24, 2014 at 11:57pm

Trig
What is the common ratio, r, for the sequence represented by the formula an = 3(2)^-n? 1/2 2 3 6 Is it 2?
Saturday, May 24, 2014 at 1:06am

trig
A loading ramp is 35 feet long and forms an angle measuring 10° with the ground. How high is the top end of the ramp off the ground? Round your answer to the nearest tenth?
Thursday, May 22, 2014 at 6:40pm

Trig help
What values for theta(0<_theta<_2pi) satisfy the equation? 3sin theta = sin theta-1
Tuesday, May 20, 2014 at 12:21pm

Trig
A 24-foot ladder is placed against a building. The building is perpendicular to the level ground so that the base of the ladder is 11 feet away from the base of the building. How far up the building, in feet, does the ladder reach? Round to nearest hundredth.
Monday, May 19, 2014 at 12:53pm

Precal/trig
sina=3/5, pi/2<a<pi evaluate cos2a
Monday, May 19, 2014 at 12:54am

trig
In right ∆LMN, sin M = 0.759. What is cos N?
Friday, May 16, 2014 at 10:10am

Math - Int Trig
31) Locate, name, and classify the extrema of the function. Determine intervals which the function is increasing and decreasing f(x) = -x(x^2 - 2) 32) Determine the end behavior of the function f(x) = 2x - x^3
Friday, May 16, 2014 at 3:42am

Math - Int Trig
Form a polynomial f(x) with real coefficients having the given degree and zeros 21) Degree: 4, zeroes: 2i and -3i 22) Degree: 3, Zeroes i and -10
Thursday, May 15, 2014 at 9:36pm

Math - Int Trig
Write an equation for the function that is finally graphed after the following transformations are applied to the graph y=|x|. The graph is shifted right 3 units, stretched by a factor of 3, shifted vertically down 2 units, and finally reflected across the x-axis.
Thursday, May 15, 2014 at 1:07pm

Trig 3
Why does 1 - COS2(Squared) _________________ COS2 = tan2
Thursday, May 15, 2014 at 9:56am

Help me trig.
solve the equation in the interval [0,2pi) tan (t/2)-sint=0
Wednesday, May 14, 2014 at 10:54pm

Trig
Find a parametric equation for the ellipse. Make sure that the graph of your parametric equation is a complete ellipse. 3x^2+4y^2=12
Wednesday, May 14, 2014 at 7:41pm

Trig 2
What is the smallest value for x where y = sin 2x reaches its maximum ...wtf that means.
Tuesday, May 13, 2014 at 7:41pm

Trig help
1. What is the period of the function? y = 4 cos pi x A. 1 B. 2 C. pi D. 2pi 2. Which represents the reference angle for 2pi/3? A. 2pi/3 B. pi/3 C. pi/4 D. pi/6
Tuesday, May 13, 2014 at 6:56pm

Trig
If it helps the answer according to this ACT compass sample test questions print out is 6.93. How to solve it is the question ... C is a 90 degree angle. AB is 8 and the hypotenuse. AC is the base .... we don't know it's length. It's on page 14 if you google this...
Tuesday, May 13, 2014 at 9:31am

trig
A man on a 135 feet cliff perpendicular (at 90 degrees) to the ground looks down at an angle of 16 degrees and sees his friend. How far away is the man from his friend? How far away is the friend from the base of the cliff? Sketch the triangle that matches this scenario with a...
Monday, May 12, 2014 at 5:55pm

MATH: TRIG
IF X IS AN ANGLE IN THE FIRST QUADRANT AND COSX= 3/5, FIND THE EXACT VALUE OF SIN2X DONT UNDERSTAND, KNOW THAT THE COSX IS ON A 3,4,5 TRIANGLE
Monday, May 12, 2014 at 3:44pm

Trig
Use trigonometric identities to solve the equation csc^2x -(√3+1)cotx+(√3-1)=0 in the interval [0, 2pi]
Friday, May 9, 2014 at 6:39am

trig
solve the equation on the interval [0, 2pi]: tan^2 x - 3 tan x + 2 = 0
Thursday, May 8, 2014 at 10:01pm

Trig
Evaluate tan(a-b). No decimals. Only exact answer. Sin a = -7/25, cot b = -8/15 neither a nor b are in quadrant IV.
Wednesday, May 7, 2014 at 3:06pm

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 3:06pm

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 3:05pm

Trig
Evaluate tan(a-b). No decimals. Only exact answer. Sin a = -7/25, cot b = -8/15 neither a nor b are in quadrant IV.
Wednesday, May 7, 2014 at 12:48pm

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

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