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March 30, 2015

March 30, 2015

**Recent Homework Questions About Trigonometry**

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**Trig**

The polynomial function f(x) is defined by f(x)=-4x^4+9x^3+2x^2-7x-2. Use a graphing calculator to find all the points where there is a local minimum. Round to the nearest hundredth.
*Sunday, May 15, 2011 at 12:10am*

**Trig**

I need help, I don't remember what to do. Find all solutions of the equation in the interval [0,2pi]. (2cosè+sqrt3)(cscè+1)=0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.
*Saturday, May 14, 2011 at 7:18pm*

**Trig- Check my answer Please**

Find the unit vector in the direction of <-1,-2>. Do not approximate any numbers in your answer. I get (-1/sqrt10) and (-3/sqrt10)
*Saturday, May 14, 2011 at 5:23pm*

**trig**

if point P is a point on the terminal side of 0, and 0 is in standard position, find sin 0,cos 0 and tan 0. 1. P(-6,8) 2. P (1,3) 3. P (-2,-40), 4. P (-5, -12)
*Saturday, May 14, 2011 at 1:00pm*

**trig**

If cos 0 = - 1/2 and tan 0 > 0, find the quadrant that contains the terminal side of 0, and then find the exact values of the other five trig functions of 0.
*Saturday, May 14, 2011 at 11:40am*

**trig**

if sin 0 > 0 and tan 0 < 0, what quadrant contains the terminal side of 0.
*Saturday, May 14, 2011 at 11:33am*

**Trig- Check my answer Please**

Find the reference angle for -144 degrees. I'm coming up with 504 degrees, but I think I'm missing a step.
*Saturday, May 14, 2011 at 8:21am*

**Trig**

I need help solving the two problems below. Thanks For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. Check all symmetries that apply. 1. y=-sqrt(4-x^(2)) 2. 34x^(2)+12y^(2)=18
*Friday, May 13, 2011 at 8:01pm*

**trig**

simplify (sec^2x + csc^2x) - (tan^x +cot^2x) to either a constant or a basic trigonometric function.
*Friday, May 13, 2011 at 8:44am*

**Trig**

I need help solving the two problems below. Thanks For each equation, determine whether its graph is symmetric with respect to the -axis, the -axis, and the origin. Check all symmetries that apply. 1. y=-ã(4-x^(2)) 2. 34x^(2)+12y^(2)=18
*Friday, May 13, 2011 at 4:52am*

**Trig**

How can I find the exact value of Sin 480 degrees? Thanks
*Thursday, May 12, 2011 at 10:23pm*

**Trig**

Let (theta) be an angle in quadrant II such that sec(theta) -4/3 . Find the exact values of cot (theta) and sin (theta).
*Wednesday, May 11, 2011 at 9:15pm*

**trig**

Let be an angle in quadrant II such that sec(theta) -4/3 . Find the exact values of cot (theta) and sin (theta).
*Wednesday, May 11, 2011 at 9:08pm*

**trig**

how do you graph y=-(1/4)sin(3/4x+pi/8? include the amplitude, period, vertical translation, horizontal shift, and table of values please.
*Wednesday, May 11, 2011 at 8:10pm*

**Trig- Check my answer Please**

Use a cofunction to write an expression equal to csc(4ð/11). Is the answer csc(4ð/11)= 1/sin(4ð/11)
*Wednesday, May 11, 2011 at 7:31pm*

**Trig**

Use a cofunction to write an expression equal to csc(4ð/11). I need help solving this problem. Thank You
*Wednesday, May 11, 2011 at 4:53am*

**Trig**

Cos(2theta)=-1/2 There are 6 solutions, how do i solve this?
*Tuesday, May 10, 2011 at 10:32pm*

**trig**

Let (theta) be an angle in quadrant II such that csc(theta)=8/5 Find the exact value of tan(theta) and cos(theta).
*Tuesday, May 10, 2011 at 9:31pm*

**trig**

Let (theta) be an angle in quadrant II such that csc(theta)=8/5 Find the exact value of tan(theta) and cos(theta).
*Tuesday, May 10, 2011 at 9:30pm*

**trig**

How would you go about finding x and y?? [x-8 2 2y] [9x-16 2 6] [ 2 -7x 7] = [ 2 -7 7] [-4 y-4 2] [-4 -1 2]
*Tuesday, May 10, 2011 at 7:52pm*

**Trig**

How would you write the partial fraction decomposition of the rational expresion 1/(x^2)-25? I know that you factor the denominator, so that's 1/(x-5)(x+5). What are the next steps?
*Tuesday, May 10, 2011 at 7:45pm*

**Trig**

Find Theta in the degree measure for the indicated quadrant. Show the diagram. cot (Theta)= -(Radical 3/1)in quadrant IV. I got 240 degrees but i dont know how to do the diagram since 240 degrees is in quadrant III. How do you put this in a diagram?
*Tuesday, May 10, 2011 at 3:48pm*

**trig**

CosA x cos2A + ((sin2A)^2)/2cosA
*Tuesday, May 10, 2011 at 9:23am*

**trig question**

During a 12- hour period, the tides in one area of the Bay of Fundy causes the water level to rise to 6 m above the average sea level and to fall 6 m below average sea level. The depth of the water at low tide is 2m as measured against a pier. Suppose the water is at average ...
*Monday, May 9, 2011 at 9:26pm*

**Trig problem**

During a 12- hour period, the tides in one area of the Bay of Fundy causes the water level to rise to 6 m above the average sea level and to fall 6 m below average sea level. The depth of the water at low tide is 2m as measured against a pier. Suppose the water is at average ...
*Monday, May 9, 2011 at 6:41pm*

**trig**

find sin if cos(2è)=(4)/(5) and theta terminates in quadrant 1
*Monday, May 9, 2011 at 5:53pm*

**trig**

How do you solve cos(2arcsin 1/4) using inverse trig. functions??!! PLEASE HELP ME!
*Monday, May 9, 2011 at 11:20am*

**trig**

if sec theta=-5/4 and 180degree < theta< 270degree, find tan theta a.-3/5 b 4/5 c.3/4 d.3/5
*Sunday, May 8, 2011 at 5:35pm*

**trig **

1st-the reason i keep change my name because some of my friends are using my computer by their own name to asked questions. we are having a hard time solving each trig problems 2nd- if sin theta=0.6 and 90 degree <theta < 180 degree, find the exact value of sin 2 theta. ...
*Sunday, May 8, 2011 at 5:16pm*

**trig**

Determine the value of cos(theta) given that cos(pi − theta) = .2 (A)p.96 (B) .2 (C) −.2 (D) −sqrt.96 (E) None of the above.
*Sunday, May 8, 2011 at 4:09pm*

**trig**

What is the cotangent of 0 degree? (A) 0 (B) 1 (C) 1/2 (D) −1 (E) None of the above.
*Sunday, May 8, 2011 at 4:08pm*

**trig**

A right triangle has sides of length 5, 12 and 13. What is the sine of the angle opposite the hypotenuse? (A) 1 (B) 5/12 (C) 5/13 (D) 12/13 (E) None of the above.
*Sunday, May 8, 2011 at 4:06pm*

**trig**

If csc(x) =1/sqrt7 then sec(x) equals (A)p7/7 (B) 6/7 (C)p6/p7 (D)p7 (E) None of the above.
*Sunday, May 8, 2011 at 4:05pm*

**trig**

The tangent of an acute angle equals 1/2. What is the sine of the angle? (A) 1/p3 (B)p5/2 (C) 2/p5 (D) 1/p5 ( E) None of the above.
*Sunday, May 8, 2011 at 11:57am*

**trig**

In a right triangle the hypotenuse has length 10 and the the sum of the cotangents of all three angles of the triangle equals 2. What are the lengths of the other two sides of the triangle? (A) 5 and 5p3 (B) 5p2 and 5p2 (C) 1 and3 p11 (D) 4 and 2p21 (E) None of the above.
*Sunday, May 8, 2011 at 11:56am*

**trig**

How many solutions does the equation cos(x) + cos(−x) = 0 have if 0 < x < 2pi? (Radian measure is assumed for x.) (A) infinitely many (B) 1 (C) 2 (D) 3 (E) None of the above.
*Sunday, May 8, 2011 at 11:54am*

**trig**

A sine wave function f(x) = a sin(bx) has amplitude 10 and period 40. What are the values of a and b? (A) a = 10 and b = 20/pi ( B) a = 10 and b = 1/40 (C) a = 10 and b = pi/20 (D) a = 10 and b = 40 E) None of the above.
*Sunday, May 8, 2011 at 11:53am*

**trig**

use a half angle formula to find the exact value of cos 75 degree
*Sunday, May 8, 2011 at 9:56am*

**trig**

Find a numerical value of one trigonometric function of x if secxcotx=4 A.cscx=1/4 b.secx=4 c.secx=1/4 d.cscx=4
*Sunday, May 8, 2011 at 9:20am*

**trig**

Find the exact values of the other trig functions of theta given sec theta=7 and sin theta is less than 0.
*Sunday, May 8, 2011 at 12:35am*

**trig**

A triangle T has vertices P, Q and R. The length of the edge between P and Q is 10, and the angles at P and Q are 60degree and 45degree respectively. What is the area of T? (A) 50p3/(1 +p3) (B) 10p3/(1 +p3) (C) 50/(3 + 3p3) (D) 10/(3 + 3p3)(E) None of the above.
*Saturday, May 7, 2011 at 6:36pm*

**trig**

A triangle T has vertices P, Q and R. The length of the edge between P and Q is 10, and the angles at P and Q are 60degree and 45degree respectively. What is the radian measure of the angle at R? (A) 5pi/24 (B) 5/24 (C) 5pi/12 (D) 5/12 (E) None of the above.
*Saturday, May 7, 2011 at 6:34pm*

**trig**

Find the numerical value of cos(60degree) + cot(30degree): (A) 1/2 (B) 3p3/2 (C) 12 +p3 (D) 52p3 (E) None of the above.
*Saturday, May 7, 2011 at 6:33pm*

**trig**

A tree casts a shadow 50 yards long when the angle of the sun (measured from the horizon) is 30 degree. How tall is the tree in feet? (A) 150p3 (B) 50p3 (C) 150 (D) 75p3 (E) None of the above.
*Saturday, May 7, 2011 at 6:31pm*

**trig**

The hypotenuse of a right triangle has length 8 and one of the other edges has length 3. What is the sine of the angle opposite the edge of length 3? (A) 3/p55 (B) 3/8 (C)p55/8 (D) 55/64 (E) None of the above.
*Saturday, May 7, 2011 at 5:16pm*

**trig**

Determine the value of cos(theta) given that cos(pi âˆ’ theta) = .2 (A) p.96 (B) .2 (C) âˆ’.2 (D) âˆ’p.96 (E) None of the above.
*Saturday, May 7, 2011 at 5:15pm*

**trig**

Find the sum of all of the solutions to the equation cos(2x) âˆ’ sin2(x) âˆ’ 1 = 0 in theinterval 0 < x < 5 pi. (Use radian measure for x.) (A) 15pi (B) 0 (C) pi (D) 10pi (E) None of the above.
*Saturday, May 7, 2011 at 5:12pm*

**trig**

2. A circle has a radius of 10 centimeters. Find the length, in centimeters, of the arc intercepted by a central angle of 100 degree. (A) 50pi/9 (B) 100pi/9 (C) 500pi/9 (D) 18pi/5 (E) None of the above.
*Saturday, May 7, 2011 at 5:10pm*

**trig**

express the trig. ratios sinA,secA n tanA in terms of cotA.
*Saturday, May 7, 2011 at 5:49am*

**trig**

ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help AB = 23 CM
*Thursday, May 5, 2011 at 5:50pm*

**trig**

ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help.
*Thursday, May 5, 2011 at 5:00pm*

**trig**

(1/m)= (m-34)/(2m^2)
*Thursday, May 5, 2011 at 10:28am*

**trig**

angle a is acute and sin = u. find the other five trigonometric functions in the terms of u.
*Wednesday, May 4, 2011 at 8:21pm*

**trig confused.. pls help**

A group of mountain climbers are using trigonometry to find the height of a mountain located in the Rockies. From point A, which is due west of the mountain, the angle of elevation to the top is 56 degrees. From point B, which is due east of the mountain, the angle of ...
*Tuesday, May 3, 2011 at 9:55pm*

**trig**

solve for exact value for x between 0 and 2 pie 3sin2(x)-cos2=2?
*Tuesday, May 3, 2011 at 12:59pm*

**trig pls.. help me**

A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the rocket's angle of ...
*Monday, May 2, 2011 at 4:03pm*

**trig**

how do you solve 2nd cos 6/11 (my calculator doesn't have 2nd function0
*Sunday, May 1, 2011 at 8:31pm*

**trig**

the terminal side of angle theta in standard position lies on the line that travels through point (9,1), find sin of theta, cos of theta, tan of theta. (give exact values)
*Sunday, May 1, 2011 at 1:43pm*

**Trig**

Water is being pumped at a 3 cubic feet/minute into a cylindrical storage tank with a circular base of a radius 4 feet. Find the depth of the water (d) as a fucntion of time (t)
*Friday, April 29, 2011 at 11:36am*

**Trig**

A silo is 40 feet high and 16 feet across. find the angle of depression from the top edge to floor. How do you solve this?
*Thursday, April 28, 2011 at 10:26pm*

**Trig**

A silo is 40 feet high and 16 feet across. find the angle of depression from the top edge to floor. How do you solve this?
*Thursday, April 28, 2011 at 10:11pm*

**Trig**

What is the period of f(x)= 1/2 tan(3x+pi/2) and -2/3 cos(x/3-1/2)?
*Thursday, April 28, 2011 at 10:01pm*

**Trig**

What is the vertical asymptote of y=tan(x-pi/3)?
*Thursday, April 28, 2011 at 9:33pm*

**Trig**

If two runners determine the angle of elevation of a hot air ballon is 24.5 degrees and 22 degrees. The hot air ballon is 1500 feet directily above a point on the highway east of both runners. How far apart are they? A trigonometry question.
*Thursday, April 28, 2011 at 8:39pm*

**trig**

Verify the equation is an identitiy: cot(x)tan(x+pi) - sin(pi-x)cos((pi/2)-x) = cos^2x Thanks
*Wednesday, April 27, 2011 at 8:28pm*

**trig**

A coil of wire rotating in a magnetic field induces a coltage E=20sin((PIa/4) - (PI/2)). Use an identity to express this in terms of cos(PIa/4). Types of Identities: Double Angle, Half Angle, Sum and Difference of Sine, Cosine, and Tangent, Pythagorean, Reciprocal, Quotient. ...
*Wednesday, April 27, 2011 at 8:23pm*

**identities trig?**

find all solutions to the equation in the interval [0,2pie] cos2x=cosx
*Tuesday, April 26, 2011 at 9:47pm*

**ah trig help**

use an apropriate sum or difference indentity to prove the double-angle identity cos2u=1-2sin2u
*Tuesday, April 26, 2011 at 9:39pm*

**trig**

use a sum or difference identity to find an exact value cos pie/12
*Tuesday, April 26, 2011 at 9:35pm*

**trig identies 5.3 &5.4**

use a sum or difference identity to find an exact value pie/12
*Tuesday, April 26, 2011 at 9:31pm*

**trig identities**

cos94 degrees cos18 degrees+ sin94 degrees sin18 degrees. write the expression as the sine, cosine, or tangent of an angle.
*Tuesday, April 26, 2011 at 9:22pm*

**math**

4cot^2x-4/tanx+cosxsecx factorin algenraic single trig function
*Tuesday, April 26, 2011 at 5:34pm*

**trig**

how do i solve this completing the square problem: 3x^2+12x+10=0
*Tuesday, April 26, 2011 at 2:54pm*

**trig**

The lengths of 2 adjacent sides of a parallelogram are 42 cm and 36cm. an angle of the parallelogram is 4o degrees. Find the measure of the longest diagonal to the nearest tenth of a centimeter.
*Tuesday, April 26, 2011 at 2:07pm*

**trig.**

Find the degree measures of 2 angles, one positive and one negative that are co-terminal with 135.
*Tuesday, April 26, 2011 at 2:05pm*

**trig **

Each child in a family of 3 children is going to get a pet. One wants a dog or cat, another wants a bird or rabbit, and the third wants a frog or snake. List a sample space or draw a tree diagram and determine the number of possible outcomes.
*Tuesday, April 26, 2011 at 2:04pm*

**trig**

finding the period of a graph given a equation y=-5sin1/3(x-pi/2)
*Tuesday, April 26, 2011 at 1:49pm*

**Trig**

a clock has a diameter of 1 foot what is the angular size if viewed from a distance of 27 feet
*Tuesday, April 26, 2011 at 1:04pm*

**algebra 2 and trig (math)**

Find the value of x in the interval 0 is less than or equal to x and 360 is greater than or equal to x which satisfies the equation cos x - 2 cos x sin x.
*Tuesday, April 26, 2011 at 12:09am*

**algebra 2 and trig (math)**

Find the positive acute angle that satisfies the equation tan(squared) minus tan = 0.
*Monday, April 25, 2011 at 11:49pm*

**trig**

What is the shortest possible length of a triangle side facing an angle of 20 degrees, if one of the other sides is 5? (answer should be a decimal number, correct within 0.001)
*Monday, April 25, 2011 at 7:07pm*

**trig**

given a central angle of 66 degrees find the area of a sector in a circle of radius 12.1 inches
*Monday, April 25, 2011 at 3:27pm*

**trig**

what is angular velocity if 57 revolutions are completed in 8 minutes?
*Monday, April 25, 2011 at 3:26pm*

**trig**

find, to the nearest tenth of a meter, the length of the arc intercepted by a central angle of 160 degrees if a radius of the circle in 8 meters long
*Sunday, April 24, 2011 at 10:13pm*

**trig**

find, to the nearest tenth of an inch, the length of the arc intercepted by a central angle of (4pi)/3 radians if a radius of the circle is 22 inches long
*Sunday, April 24, 2011 at 10:11pm*

**trig**

I need help with this problem: If San Francisco Giants homerun king, Barry Bonds, hit a baseball due west with a speed of 50.0 m/s, and the ball encountered a wind that blew it north at 5.00 m/s, what was the resultant velocity of the baseball?
*Saturday, April 23, 2011 at 6:03pm*

**trig**

an angle 30 with the distace of 24km and an angle of elevation of 45 with the distance of 15km.
*Saturday, April 23, 2011 at 6:48am*

**Math calculus-Trig**

Find the area bounded by the curve and the lines y = -x^2 - 4x; y = 1; x = -3; x = 1
*Thursday, April 21, 2011 at 6:16pm*

**Calculus/ trig**

Find the area bounded by the curve and the lines y=sinx, y= 1/2, x=5pi/6 and x=pi/6
*Thursday, April 21, 2011 at 5:17pm*

**trig**

write each equation in its equivalent logarithmic form 8 7=300
*Wednesday, April 20, 2011 at 8:15am*

**trig**

sin^-1(sin5pi/6)
*Tuesday, April 19, 2011 at 8:18pm*

**trigonometry**

simplify sin7x-sin3x as a product of trig functions.
*Tuesday, April 19, 2011 at 8:16pm*

**trig**

convert the point with polar coordinates (2,7pi/6) into rectangular coordinates.
*Tuesday, April 19, 2011 at 8:13pm*

**trig**

The parametric equations for a curve in the x-y plane are x=2+t^2 and y=4-3t. Determine the points where the curve intersects the x-axis.
*Tuesday, April 19, 2011 at 8:12pm*

**trig**

simplify the expression: sin(theta+pi/4) + sin(theta-pi/4)
*Tuesday, April 19, 2011 at 8:08pm*

**trig**

angle x lies in quadrant 3 and cos(x)=-.6. Find cos(3pi/2-x)
*Tuesday, April 19, 2011 at 1:33pm*

**trig**

simplify the expression sin(theta+pi/4) + sin(theta-pi/4)
*Monday, April 18, 2011 at 10:15pm*

**Algebra2/ Trig**

During a baseball season, a company pledges a donation to a charity of $5000 plus $100 for every home run hit by the local team. Does it make more sense to represent this situation using a sequence or a series? Explain your reasoning.
*Monday, April 18, 2011 at 2:20pm*

**trig**

what is the cube root of (-64i)?
*Sunday, April 17, 2011 at 5:54pm*

**trig**

What is the trigonometric notation for 3-3(sqrt3i)?
*Sunday, April 17, 2011 at 1:14pm*

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