Wednesday
February 10, 2016

# Homework Help: Math: Trigonometry

## Recent Homework Questions About Trigonometry

Trig
cot (tan + cot) = ?
Tuesday, December 20, 2011 by Don

Trig
( sec -1 )(sec +1 ) = ?
Tuesday, December 20, 2011 by Don

Trig
sin/tan = ?
Tuesday, December 20, 2011 by Don

Trig - Thanks Damon and Lindsey
Thanks a bunch
Tuesday, December 20, 2011 by Don

trig
The cross section of a television antenna dish is a parabola. A dish has a receiver that is located at the focus, 4 ft. above the vertex. Find the equation. (which I did) -- x^2 = 8y If the dish is 8 feet wide, how deep is it?
Tuesday, December 20, 2011 by lindsey

Trig
If sin = 2/3 and is a second quadrant angle, determine the exact value of sec^2 could be a. 5/9 b. root5/3 c. 9/4 d. 9/5 Please help.......
Tuesday, December 20, 2011 by Don

trig
You are sky diving and are trying to land on a target with a radius of 15 m. You land 10 m west and 10 m north of the center of the target. a. Write an inequality to describe the region inside the target area. b. Do you land within the target area? c. If another skydiver lands...
Tuesday, December 20, 2011 by Elle

trig
cot^5 x = cot x/sec^4 x - 2 sec^2 x +1
Monday, December 19, 2011 by tiara

trig
find the exact value of sin(u+v) given that sin u=3/5 and sin v= 15/17
Sunday, December 18, 2011 by k

trig
Solve the following equation for È <= È <= 2(pi) 2 tan È + 3 = tan È
Sunday, December 18, 2011 by Anonymous

trig math
Prove that tan(theta)tan(60+theta)=tan3theta
Saturday, December 17, 2011 by Rajesh kumar

Trig
The next two steps in solving this trig identity question are ??? 1/csctheta x costheta x sintheta x sectheta = sinsqtheta arghhh need help please
Saturday, December 17, 2011 by Don

Trig
Prove the equation is an identity : csc3theta - csctheta + cottheta/csctheta = cotsqtheta + costheta wow ... try that one
Saturday, December 17, 2011 by Don

Trig
Prove that the equation is an identity: cot4theta - csc4theta = -cot sq theta - csc sq theta How ??
Saturday, December 17, 2011 by Don

Trig - Thanks Damon
Thanks for the help Damon. Much appreciated. Don
Saturday, December 17, 2011 by Don

Trig
Column 1 Column 2 (sin theta + cos theta)sq 1 + 2sin theta cos theta Question : how do you get column 1 to be the same as column 2?? using the trig identities
Saturday, December 17, 2011 by Don

Trig
Column 1 Column 2 sec theta - cos theta tan theta sin theta Question: how do you get column 1 to be the same as column 2 ?? using the eight fundamental identities
Saturday, December 17, 2011 by Don

Trig
Please disregard last question .... wrote it down wrong .. Thanks
Saturday, December 17, 2011 by Don

Trig
Eight Fundamental Identities Sec thada - Cos thada How do I do this?
Saturday, December 17, 2011 by Don

trig (pre-cal class)
Suppose è is an acute angle of a right triangle. For this function, find the values of the remaining five trigonometric functions of è. Round to four decimal places. sin è = 0.1 cos è = tan è = cot è = csc è = sec è =
Thursday, December 15, 2011 by Allison

trig
How do you find 2.8 revolutions per second in radians? I understand that two revolutions would be equal to 4pie but how do you find the 0.8?
Wednesday, December 14, 2011 by John

trig
A force of 50 pounds acts on an object at an angle of 45°. A second force of 75 pounds acts on the object at an angle of -30°. Find the direction and magnitude of the resultant force.
Wednesday, December 14, 2011 by Cam

trig
A bolt secured to a bridge is being acted upon by forces being exerted by two cables attached to the bolt. The force vector for one of the cables is represented by F1 = <1.7,9.8>. The other force vector, F2, is known to have a magnitude 5 and a direction angle of 10 ...
Wednesday, December 14, 2011 by John

trig
SinA =0.5 cosA=?
Wednesday, December 14, 2011 by Ram

trig
Find ALL solutions to the equation on the interval [0, 2pie]: 2sin(1/2X) = 1
Wednesday, December 14, 2011 by John

trig
Find the exact values of the inverse function arcsin 1/2
Tuesday, December 13, 2011 by Nick

trig
A tree casts a shadow 203 feet long. Find the number of feet in the height of the tree knowing that the angle of elevation of the sun is 16 degrees. Give your answer to the nearest integer. a. 57 b. 56 c. 61 d. 58 e. 55
Tuesday, December 13, 2011 by James B

Trig
The set of solution(s) of 2 cos^2 (θ) - 13 cos(θ) + 6 = 0 that is(are) in the interval (0,π/2) is one of following a. {π/6} b. {π/3} c. {π/4} d. {π/3, π/6} e. {π/6, π/4}
Tuesday, December 13, 2011 by Lenny

Trig
In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A
Tuesday, December 13, 2011 by Carl

Trig
How do you find cosine, tangent, and cotangent periods?
Tuesday, December 13, 2011 by Dane

Trig
Which trigonometric function can equal or be greater than 1.000? A Sine B Cosine C Tangent D none of the above
Tuesday, December 13, 2011 by Carl

trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx
Tuesday, December 13, 2011 by Rin

trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx
Tuesday, December 13, 2011 by Rin

trig/precalculus
A crate weighing w pounds sits on a ramp positioned at an angle of x with the horizontal. The forces acting on this crate are modeled by the equation Mwcosx = wsinx, where M is the coefficient of friction. What is an expression for M in terms of x? A. M = tanx B. M = cotx C. ...
Tuesday, December 13, 2011 by Joesph

trig/precalculus
A crate weighing w pounds sits on a ramp positioned at an angle of x with the horizontal. The forces acting on this crate are modeled by the equation Mwcosx = wsinx, where M is the coefficient of friction. What is an expression for M in terms of x? A. M = tanx B. M = cotx C. M...
Tuesday, December 13, 2011 by A

Math - Trig
For the equation 4 cos theta - square root 12 = 0, where 0 < theta < (or equal to) 2 pi, determine the measure of theta. The answers to choose from are: A) pi/ 3, 5 pi/ 3 B) 2 pi/ 3, 4 pi/ 3 C) 5 pi/ 6, 7 pi/ 6 D) pi/ 6, 11 pi/ 6 Please explain and show work, because I ...
Monday, December 12, 2011 by Angi

trig
Find the exact value of the trigonometric function. -cot(pi/4 + 16pi)
Monday, December 12, 2011 by Keenia

trig
How do you evaluate the expression cos3pi
Sunday, December 11, 2011 by Freckles

trig
A satellite is in geostationary orbit 22,500 miles above the earth. IF the radius of the earth is 3,960 miles, how fast is the satellite moving in miles per day? How fast is the satellite moving in miles per hour?
Sunday, December 11, 2011 by shawna

Math
Trying to understand an inverse trig function. Evaluate Cos^-1 (sqr3/2) So I know it's 30 degrees, but wouldn't it also be 150 degrees because the Arc-cos is defined in the 2nd quadrant?
Sunday, December 11, 2011 by Bobby

trig
Getting ready for trig semester finals. Can't figure out how they are simplifying these equations. (these are the review not actual test) tanx-sqr3=2tanx and 2sin^2+sinx=0
Sunday, December 11, 2011 by Josh

trig
How do I solve.... Tan 2(theta) - Cos 4(theta) = 0 Domain: (0-360 degrees) Thank you.
Sunday, December 11, 2011 by Heather

Math: Trig
to determine the height of a pole across a road, Justin takes two measurments. he stands at Point A directly across from the bass of the pole and determines that the angle of elevation to the top of the pole is 15.3 degrees. he then walks 30m parallel to the freeway to point C...
Sunday, December 11, 2011 by Frany

trig
How do i solve this equation over the interval [0degrees,360) cot(theta)+2csc(theta)=5
Saturday, December 10, 2011 by ALISON

trig
The manufacturer of a propeller for a small aircraft mandates a maximum operating angular velocity of 300 rad/s. Determine whether it is safe to install this propeller whose aircraft whose engine is expected to run at a maximum of 2800 rpm
Saturday, December 10, 2011 by bob

trig
If θ is an angle in standard position and its terminal side passes through the point (20,-21), find the exact value of sec(θ).
Friday, December 9, 2011 by Anonymous

trig
If (cosa-sina)/sina = 2 , then what is tga = ?
Friday, December 9, 2011 by Evelina

trig
find an expression equivalent to sec theta sin theta cot theta csc theta
Thursday, December 8, 2011 by Anonymous

Math- Trig
In an oblique triangle ABC, A=30 degree, and the perpendicular from C to AB is 12 inches long. Find the length of AB.
Thursday, December 8, 2011 by Alisha

trig
Prove that the statement is an identity: (tanx/cscx)=(1/cosx)-cosx
Wednesday, December 7, 2011 by Ashley

trig
tan theta= -4/3 and sec theta<0 find sin (theta = pi/6)
Wednesday, December 7, 2011 by Lana

Trig
1. Establish the identity: sin(theta+3pi/2)=-cos(theta) 2. Find the exact value of 2(theta) if sin(theta)=5/13 3. Show that: csc2(theta)-cot2(theta)=tan(theta) 4. Find the exact value of tan(cos^-1(square root of 3/2) 5. Approximate the value rounded to two decimal places: csc...
Wednesday, December 7, 2011 by Brittany

trig
simplify: (2sin(2pie/7))/(3cos(3pie/14)
Wednesday, December 7, 2011 by Aya

trig
I need to prove parallelogram law using the law of cosines. 2AB^2 + 2BC^2 = AC^2 + BD^2 Please, help me to do this.
Wednesday, December 7, 2011 by Evelina

trig
Cos 3 alpha = - 0.1 solutions in degree
Wednesday, December 7, 2011 by sherman

trig
a right triangle contains a 25 angle. if me leg is of length 5 inches what is the length of the hypotenuse
Wednesday, December 7, 2011 by vanessa aquino

trig
CosA*Cos17=1 then determine A
Wednesday, December 7, 2011 by kunal

Trig
Sec (23π/6)
Tuesday, December 6, 2011 by Bree

State two intervals in which the function y=7sin(1/5x)+2 has an average rate of change that is: a) zero b)a negative value c)a positive value Please explain how to get the intervals! Thanks a lot in advance!
Monday, December 5, 2011 by linda

trig
Find all the solutions of 2 sinx=1-cosx in the interval from 0° ≤x<360°
Monday, December 5, 2011 by Anonymous

trig
if the terminal ray of an angle 0 in standard position passes through the point (-1,3),then cos0=
Monday, December 5, 2011 by jason

trig
find all solutions of 2sinx=1-cosx in the interval from 0 to 360
Monday, December 5, 2011 by Anonymous

precalc/trig
Solve the Logarithmic equation algebraically. Give an Exact Answer and an approximation for x to four decimal places. 20 log(2x+2)=45
Monday, December 5, 2011 by Alexander

precalc
Suppose that z1=6-8i. Find: A. The Trig Form of the complex number z1, where your theta is in degrees. B. The Trig form of z1*z2, where z2=5[cos(60degrees)+isin(60degrees)] C. The Trig Form of (z1)^4
Monday, December 5, 2011 by Joshua

trig
Find the exact solutions of the equation in the interval [0,2pi). sin(x/2)+cos(x)=0
Monday, December 5, 2011 by Isaac

trig
We are doing trig identities in school. I need help with these five: 1.1+sinx/1-sinx=cscx+1/cscx-1 2.tanx+sinx/1+cosx=tanx 3.sec^2x/sin^2x=1/sin^2x+1/cos^2x 4.tan^2x/1+tan^2x=1-cos^2x 5.sinx-sin^3x/cos^3x=tanx
Sunday, December 4, 2011 by Jay

trig
a 30 foot ladder leans against a wall at a 71 degree angle of elevztion find the distance of a ladder's base to the wall
Saturday, December 3, 2011 by jennifer

trig
Mr. Saurik proposed that the function h(t) = 6sin(3pi(t) - pi/3) + 5, where h(t) is in meters and t is in seconds, models the height above the ground of a point on a spinning wheel. Is Mr. Saurik's equation plausible? Explain.
Saturday, December 3, 2011 by Alisha

precalc/trig
Write the partial fraction decomposition of the rational expression. 4x^2–19x+31/ (x+2)(x^2–4x+5)
Saturday, December 3, 2011 by Robert

trig
How to prove the theorem of sines, using S=(a*b/2) * sin γ ?
Friday, December 2, 2011 by Evelina

At one time, Maple Leaf Village (which no longer exists) had North America’s largest Ferris wheel. The Ferris wheel had a diameter of 56 m, and one revolution took 2.5 min to complete. Riders could see Niagara Falls if they were higher than 50 m above the ground. Sketch ...
Thursday, December 1, 2011 by linda

trig
Thursday, December 1, 2011 by Anonymous

trig
Patients with acute or serious infections, such as Salmonella typhi or gram-negative bacteria causing meningitis, can be successfully treated with regular doses of Chloramphenicol. A patient weighing 150 pounds requires a dose of 850 milligrams, while a patient weighing 300 ...
Wednesday, November 30, 2011 by brit

trig
for what values of theta between 0 and 2 pi is the function of theta equal sine theta positive?
Wednesday, November 30, 2011 by matthew

trig
I need to count this: a) 1-tg^2a/1+ctg^2a, when sina =2/3 b) 1-tg^2a/1-ctg^2a, when cosa= -1/3 c) tga * cos^2a, when sina + cosa=5/7 d) tg^2a + 1/sina * 1/cosa + ctg^2a, when tga + ctga =5
Wednesday, November 30, 2011 by Evelina

trig
I need to prove equality. a) (sina + cosa)^2 -1 / ctga - sinacosa = 2tg^2a b) (sin^2x/sinx-cosx) - (sinx+cosx/tg^2x+1) = sinx + cosx c) sin^4a - sin^2a - cos^4a + cos^2a = cosπ/2 How to do these?
Wednesday, November 30, 2011 by Evelina

trig
For the following expression, find the value of y that corresponds to each value of x, then write your results as ordered pairs (x,y). y=7cos(x-pi/6) for x=pi/6, pi/3, 2pi/3, pi, 7pi/6
Tuesday, November 29, 2011 by katie

A tire with a diameter of 100 cm rotates 20 times in 3 seconds. a) determine the angular velocity b) how far the tire has travelled? c) what is the speed in km/h?
Tuesday, November 29, 2011 by linda

precalc/trig
Find the trigonometric form of the number. (Round any angles to two decimal places.) −8 − i
Tuesday, November 29, 2011 by Alex

trig
Solve the equation for exact solutions over the interval [0, 2pi]. 4 cotx+2=-2
Tuesday, November 29, 2011 by me

trig
Write cot(t) in terms of sin(t) if the terminal point determined by t is in the first quadrant. Do not leave a fraction inside a radical or use absolute value.
Monday, November 28, 2011 by Jamie

trig
cos t=.7, tan t<0. find the values of the other 5 trigonometric functions.
Sunday, November 27, 2011 by Marni

trig
find sin of theta if cos is less than 0 and cot equals 3
Sunday, November 27, 2011 by Kenzie

trig
Use the Law of Sines to solve each triangle. P=110 degrees p=125, r=200 in triangel PQR
Saturday, November 26, 2011 by Tyler

math/Right triangle trig
Your favorite team is attempting a field goal. The ball is kicked at an angle of 45 degrees with the field. The ball covers a horizontal distance of 85 inches before the kick is blocked. What is the minimum height the opposing team's player can be to block the kick?
Tuesday, November 22, 2011 by Anonymous

Trig/Math
RST is a triangle with right angle S. If s- 21.3 Angstroms and t=8.71 Angstroms, find the measure of the larger acute angle.
Tuesday, November 22, 2011 by Gregory

Trig
Triangle ABC has B= 137degrees, A=31.6 in., and C=42.8 in. Find B.
Tuesday, November 22, 2011 by Gaius

trig
In a rignt angle base is 20 mtr,adjacent side is 6 mtr, hypotenus is 20.88 mtr, what is the degree of angle of hypotenus and base
Tuesday, November 22, 2011 by sanatan

trig
In a rignt angle base is 20 mtr,adjacent side is 6 mtr, hypotenus is 20.88 mtr, what is the degree of angle of hypotenus and base
Tuesday, November 22, 2011 by Anonymous

trig
if tan theta=7/24 and sin theta is greater than 0 what is the exact value of sin theta
Monday, November 21, 2011 by Anonymous

trig
A and B are acute angles such that cosA =3 over 5 and cosB =12 over 13
Monday, November 21, 2011 by Michelle

trig
Find the exact value of the trigonometric function given that sin u = − 8/17 and cos v = − 3/5. (Both u and v are in Quadrant III.) cot(v − u)
Sunday, November 20, 2011 by Alexander

Alg. II/Trig
If m and n are real numbers, i^2=-1, and (m-n)-4i=7+ni, what is the value of m?
Friday, November 18, 2011 by Lily

Trigonometry
Help trig question involving discriminant? a)Find the value of the discriminant. b)Use any method to find the real roots of the equation if they exist. 2x^2+7x=0
Thursday, November 17, 2011 by Tomtom

trig
5. If the angles X and Y each measure between 0° and 90°, and if sinX = cosY, what is the sum of the measures of the angles X and Y?
Thursday, November 17, 2011 by kc

is this graphable??? y=x^2-4x-2
Wednesday, November 16, 2011 by bunny

trig
-Find sin(x+y), cos(x-y), tan(x+y) and the quadrant of x+y sinx=-3/5, cosy=-7/25, x and y in Q3
Wednesday, November 16, 2011 by Dana

trig
What is the exact value of 19 pie divided by 12.
Tuesday, November 15, 2011 by Jimmy

Trig
The path of a projectile fired at an inclination t0 to the horizontal with initial velocity v feet per second is a parabola. The horizontal distance R, in feet, that the projectile travels is given by R = v2sin(2t)/32.2. What is R if v = 152 and t = 74? Give your answer to the...
Monday, November 14, 2011 by Jared Smith

trig
If sin(t) = -2/48 and cos(t) < 0 what is the value of cos(t) to the nearest thousandth? If sin(t) = -14/34 and cos(t) < 0, what is the value of tan(t) to the nearest thousandth? If tan(t) = -15/19 and sin(t) < 0, what is sin(t) to the nearest thousandth? If tan(t) = ...
Monday, November 14, 2011 by Jared Smith