Monday
January 23, 2017

Homework Help: Math: Trigonometry

Recent Homework Questions About Trigonometry

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

Math - Trig please help!
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

Math -Trig Please help!
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 ...
Thursday, December 1, 2011 by linda

trig
express the product of radical 90 x radical 40 -radical 8 x radical simplifies to ?
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

Math- Trig please help!
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

algebra/trig help please
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

Trig
Solve the equation in the given domain cos 4x + cos 2x = 0, 0<(or equal to) x < pi
Monday, November 14, 2011 by Mark

trig
an isosceles triangle has a perimeter of 60in. the congruent sides measure (2x+9)cm. the length of the third side is 3xcm. what is the value of X?
Monday, November 14, 2011 by Joey

trig
cosθ =5/13 with -π/2 < θ <0 find each of the following sin( θ - 5π/4) cos( θ - 11π/6) tan( θ + 5π/4) can some1 explain to me how to do these? im completely lost and this is the only thing about my assignment that i cant do can...
Monday, November 14, 2011 by Yul

trig
find the coordinates of the terminal point on the unit circle determined by t=9pt/7 to two decimal places
Sunday, November 13, 2011 by Kristin

Math/trig
Solve the equation in the given Domain: 1-cos theta/ sin theta = sqr3, 0degrees <or equal to theta < 369 degrees cos4x + cos 2x =0, 0<or equal to x < pi
Sunday, November 13, 2011 by Dre

Trig
I have these sum and product property problems and I just want to make sure my work is right. Write equations expressing 1. cos 37degrees cos99degrees as a sum Answer: sin136+(-62) 2. sin4+sin7 as a product Answer: 2sin5.5 sin-1.5 3. cos 8x - cos 2x as a product Answer -...
Sunday, November 13, 2011 by Kevin

trig
Cos(-11/12) use the sum or difference formula to find the exact number
Sunday, November 13, 2011 by Lauren

Trig
cos(-11pi/12)
Sunday, November 13, 2011 by Lauren

Algebra/trig
How would i use my calculator to find the approximate value of the expression, cot 0.2748 rad
Sunday, November 13, 2011 by Anonymous

trig
Find theta such as tan(theta) = cot(theta+45). Thanks
Saturday, November 12, 2011 by Mari

trig
How to do this one? (sina/1-cosa) + (1-cosa/sina) = Also, wanted to ask if I did another one right: 1 - sin^2a + tg^2a * cos^2a = 1 - sin^2a + (sina/cosa)^2 * cos^2a = 1 - sin^2a + sin^2a = 1 ???
Saturday, November 12, 2011 by Evelina

trig
Please help me how to do this: 1) 1 + sina*cosa / (cosa + sina)^2 = 2) sina + cosa / 1- 2sin^2a =
Saturday, November 12, 2011 by Evelina

trig
determine the phase shift of y = sin(3x - 2pi). indicate whether the shift is to the right or left.
Friday, November 11, 2011 by clarence

trig
I have these sum and product property problems and I just want to make sure my work is right. Write equations expressing 1. cos 37degrees cos99degrees as a sum Answer: sin136+(-62) 2. sin4+sin7 as a product Answer: 2sin5.5 sin-1.5 3. cos 8x - cos 2x as a product Answer -2sin5x...
Friday, November 11, 2011 by Kevin

trig/math
If A is between 270degrees and 360degrees, and cos A=12/13, find the exact value of: sin2a, cos2a, sin1/2a, cos1/2a
Friday, November 11, 2011 by Bob

trig
whatis the possibilities for the square root of 2 times tan theta = 2 sin theta
Friday, November 11, 2011 by Anonymous

trig
To the nearest degree, determine the measure of <X for each value of tan X if the tan X = 0.25
Tuesday, November 8, 2011 by dina

trig
Two office towers are 43m apart. From the top of the shorter tower, the angle of elevation to the top of the taller tower is 26o while the angle of depression to the base is 51o. Determine the height of each tower and round your answers to one decimal place.
Tuesday, November 8, 2011 by max

trig
a tree growing on a hillside casts a 102-foot shadow straight down the hill. Find the vertical height of the tree if, relative to the horizontal, the hill slopes 15.0 degrees and the angle of elevation of the sun is 62.0 degrees.
Tuesday, November 8, 2011 by jc

trig
whats 21° 44' 3" as a decimal to the nearest thousandth of a degree
Monday, November 7, 2011 by trey

trig
find all the values of x that satisfy the equation: 2sin^2(x) + 1 = 3sin(x).
Monday, November 7, 2011 by lisa

trig
What is inverse cot of negative radical 3/3
Monday, November 7, 2011 by damian

Trig
Im having serious issues with verifying Trig. identities. Please help! Here is an example: (tanX-secX)^2= 1-sinX/1+sinX
Monday, November 7, 2011 by Rachel

Trig/advance math concepts
state the amplitude, period, and phase shift of the function -0.4 sin (10x+pie/2)
Monday, November 7, 2011 by Cilla

trig
given that sin(a+b)= 56/65, cos(a+b)-33/65, cos(b)=-12/13 and pi/2<b<pi Find: sin(a)? cos(a)? tan(a)?
Monday, November 7, 2011 by jared

Trig
Prove the following functions: (sinx+sin2x)/(1+cosx+cos2x)=tan x (cos3x/sinx)+(sin3x/cosx)=2cot2x tan2x=(2/cotx-tanx) theses are due in the am. Fastness would be great?
Monday, November 7, 2011 by jared

trig
write a product of two trig functions that equals 1.
Sunday, November 6, 2011 by Dani

trig
write an equation expressing 19cos(theta-50degrees) as a sum of sine and cosine.
Sunday, November 6, 2011 by Kate

trig
write an equation expressing: cos37cos99 as a sum Review question. I know the formula. Having trouble with working it out.
Sunday, November 6, 2011 by Gaile

trig
write equations expressing: 19cos(theta-50degrees) as a sum of sine and cosine.
Sunday, November 6, 2011 by Don

Math C30 ( trig )
A roof in the shape of an upside down cosine wave is to be buile to cover an arena. The arena is 24m wide, the height of the roof at either side wall is 5m, and the maximum height of the roof is 9m. A) write a function that gives the height of the roof in terms of your ...
Sunday, November 6, 2011 by Don

Math C30 ( trig )
Solve : cosxtanx + root3cosx - root3/2tanx - 3/2 = 0 Give exact answers and formula for the general solution as well as the specific solutions.. Help
Sunday, November 6, 2011 by Don

trig
Find exact value of the expression. sin( 27pi/4 + 17pi/6)
Friday, November 4, 2011 by Brianna

trig
y= -(x-5)2 -3
Thursday, November 3, 2011 by shanteria

Trig
Solve 2cosxsinx + sinx = 0 using unit circle.
Wednesday, November 2, 2011 by don

Trig
Solve 2cos sq x = 1 using the unit circle.
Wednesday, November 2, 2011 by don

Trig
Find all real numbers that satisfy the equation. 2 cos x + 1 = 0
Tuesday, November 1, 2011 by Anonymous

trig
Hi, I need to find the domain and rnge of the following: 1. X= 1/2 (cos theta + theta sin theta) Y=1/2 (sin theta - theta cos theta) total guess here, but here goes Domain cos theta = +/- 1 and domain sin theta = +/- 1 so domain theta sin theta = 0- +/-infinity so domain of X...
Monday, October 31, 2011 by Courtney

trig
I'm confused with this concept: Okay, so I have this problem: cos2x( 2 cos+1)= 0 I understand I have to work the problems separately and I get cos x= 2 and cos x= 1/2 Now, what I don't understand is how this connects to pi, radians or the unit circle. If someone could ...
Saturday, October 29, 2011 by Anonymous

Trig
Find the measure of the central angle, in radians, given the area of the sector as 22.6 cm2 and a radius equal to 3.7 cm
Saturday, October 29, 2011 by Julianne

trig
(3 tan^2x-1)(tan^2-3)= 0 can someone please explain how to do this problem and then explain the whole pie thing at the end...like, this is suppose to equal pie/6 b/c it's tan...im soooo confused.....
Friday, October 28, 2011 by help?

  1. Pages:
  2. <<Prev
  3. 11
  4. 12
  5. 13
  6. 14
  7. 15
  8. 16
  9. 17
  10. 18
  11. 19
  12. 20
  13. 21
  14. 22
  15. 23
  16. 24
  17. 25
  18. Next>>

Homework Help: Math