269 Answered Questions for the topic trigonometric identities

Trigonometric Identities

04/13/17

((sin(a)cos(b)-cos(a)sin(b))^2)+((cos(a)cos(b)+sin(a)sin(b)^2)
I need some help with the steps to solving this, I know that I need to foil out the problem but I need to get a numerical value for the expression. 
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Trigonometric Identities

04/12/17

How do you simplify sin(x)tan(x)+ cos(x)?
A step-by-step guide would be very appreciated. Thank you in advance.
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Trigonometric Identities

03/27/17

1/1-cos^2 theta = 1 + cot^2 theta
Verify the Identity. 
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Trigonometric Identities

03/27/17

(tan w + 1/sec w) = sin w + cos w
Verify the Identity
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Trigonometric Identities

03/27/17

(sin^2x)(1+cot^2x)=1
Verify the Identity. 
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Trigonometric Identities

03/27/17

(cos B/cot B) + (sin B/tan B) = sin B + cos B
Verify the Identity. 
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Trigonometric Identities

03/18/17

Use trigonometric identities to transform the left side of the equation into the right side.
sin^2x-cos^2x=2sin^2x-1   (tanx+cotx)/tanx=csc^2x
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Trigonometric Identities Trigonometry Trig Trig Identities

03/09/17

Proving Trig Identity
I'm having trouble trying to prove this trig identity. Help is greatly appreciated. Thanks in advance. 1/(csc-cot) = (1+cos)/sin
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Trigonometric Identities

02/20/17

Trigonometric identities
Use the trigonometric identities to write each expression in terms of a single trigonometric function. A. Sin^2 D. (tan^2 +1)Sin^2 Cos^2 B. cot +1 E. 1+ 1 tan +1 cot^2 C. Sin^2 +cos^2 F. 1-sin^2 Csc
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Trigonometric Identities

02/16/17

sin^2x-tan^2x=-sin^2xtan^2x
Please help
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Trigonometric Identities

02/16/17

sin^4x+sin^2x-2/-cos^2x=2+sin^2x
help please 
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Trigonometric Identities

02/09/17

Simplify 1-tan^4(theta)+sec^4(theta)?
I am very confused as to what identity I need to use to simplify this equation.
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Trigonometric Identities

02/05/17

When verifying trigonometric identities, can you multiply both sides by a number to make it easier to solve?
 When verifying trigonometric identities, can you multiply both sides by a number to make it easier to solve?
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Trigonometric Identities Math Trigonometry Math Help

01/18/17

Find the value for cos(x/2) if the following conditions hold: sin(x)=-12/13 and x is in Quadrant III.
A: -√(17/24)B: -√(7/24C: -√(7/6)D: -√(17/6
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Trigonometric Identities

01/12/17

Find the trig value
Use knowledge of trig identities to find the trig value below.If csc α = 5/2 , find sec α cot α
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Trigonometric Identities Trigonometry

12/19/16

Prove the identity
prove (1 - cos2x)(1 - tan2x) = sin2x cos2x/1-sin2x   I got as far as....   Using the left side:(1 - cos2)(1 - tan2)(1 - cos2)(1 - sin2/cos2)1 - cos2 - sin2/cos2 + sin2   but now I am stuck
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Trigonometric Identities Trigonometry Identities

12/18/16

Trig Identity - Prove Each Identity - Show All Work
prove (1 - cos2x)(1 - tan2x) = sin2x cos2x/1-sin2x   I can't seem to solve this! Halp!!!
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Trigonometric Identities

12/17/16

Use your knowledge of trig identities to find the trig value below.
If csc ∝ = 7/4, find cos∝cot∝ + sin∝.   Please include steps. I don't know how to go about this one.
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Trigonometric Identities Trigonometry Trig

12/14/16

Are 2tantheta and tan2theta the same thing? If not then how do i plug both into my calculator?
I have a math problem in which I have to prove the identity sin2θ= 2tanθ/1+tan2θ using Double-Angle Identities and I'm trying to figure out how to solve it.
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Trigonometric Identities

12/05/16

(tan(x)+sec(x)-1)/(tan(x)-sec(x)+1)
to prove: (tan(x)+sec(x)-1)/(tan(x)-sec(x)+1)=sec(x)+tan(x)
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Trigonometric Identities Trigonometry Trig Trigonometry Identities

12/03/16

Simple Trig, got lost and need help.
Solve the given equation over the interval [0,2): 2sinx+ (sqrt 3) sin^2x=-(sqrt 3) cos^2x A. x=0, and x=(pi/2), and x=(3 pi/2), and x=2(pi)x=(3 pi/2), and x=(7 pi/2) b. x=(4 pi/3) and x=(5... more
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Trigonometric Identities Trigonometry Trig Trigonometry Identities

11/30/16

Need help with simple Trig!
Provide an exact evaluation of the expression: tan (-285°).
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Trigonometric Identities Trigonometry Math Help Trig

11/30/16

Need Urgent Trig Help!!
Find the value for sin (θ) if the following conditions hold: cos(2(theta)) = 3/5 and 90(degrees) < (theta) < 180(degrees) A. (1/25) B. (sqrt5/25) C. (2 sqrt5/5) D. (sqrt5/5)
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Trigonometric Identities

11/19/16

Trig Proof
Prove: tanA + cotB= cos(A-B) / cosAsinB
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Trigonometric Identities Trigonometry

11/15/16

Write the following in terms of sin (theta) only: 2sec(theta)tan(theta)+tan^2(theta)
Write the following in terms of sin (theta) only: 2sec(theta)tan(theta)+tan^2(theta)
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