75 Answered Questions for the topic Trigonometry Identities

Trigonometry Identities

07/24/14

How to prove this identity
tan3x - tan2x- tanx = tan3xtan2xtanx
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Trigonometry Identities

05/05/14

verify identity
sin(X)sec(x)=1-(cos^2)x/sin(X)cos(X)
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Trigonometry Identities Math Trigonometry Math Help

01/03/14

Rewrite 6(sin5x)cos2x
This is for my trig class. Thanks for the help!
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Trigonometry Identities Math Trigonometry Math Help

12/31/13

Use the sum or difference formulas to determine: A. sin105 degrees B. tan15 degrees
This is for my trig class. Thanks for the help!
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Trigonometry Identities Trigonometry Identities Verify Identity

12/12/13

Verify the identity 1/tan(theta)csc(theta) = cos(theta)
This is for my trig class, and the directions say to verify the identity. Thanks so much.
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Trigonometry Identities Calculus Trigonometry Precalculus Homework

12/11/13

Q2 POW #3 -Trig Identities
1) given the double angle identity for cosine: cos2θ=cos2θ-sin2θ      Prove: cos3θ = cos3θ - 3cosθsin2θ         and: cos4θ = cos4θ - 6cos2θsin2θ + sin2θ 2) Continue this process, finding an... more
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Trigonometry Identities

12/08/13

prove the trigonometric identity
(1-cos^2x)(cot^2+1) = 1
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Trigonometry Identities

12/08/13

prove the following trigonometric identity
2sin^2x - 1÷ sinxcosx = tanx-cotx
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Trigonometry Identities

11/25/13

Solve the Trigonometry Identity
cosx = (1- tan^2 x/2)  /  1 + tan^2 x/2)Completely stuck.
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Trigonometry Identities

10/30/13

Trig Identities
Explain how you could determine the exact value of (sec 7pi/6) if you know the value of (sin 11pi/6). Prove with diagrams.I've no idea how to do this question that's worth 10 marks.
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Trigonometry Identities

10/28/13

Trig Identities
Prove1 - sin2x / cosx = sin2x / 2sinxI tried do both LHS and RHS. Got stuck after a step or two.
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Trigonometry Identities

10/28/13

Trig Identities
Provesec2x = 1 + tan2xI did R.H.S= 1 + sin2x / cos2x= 1 + (1 - cos2x) / (1 - sin2x)= 1 + cot2x= ???I think I'm doing it right, but I don't know how to solve now.
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Trigonometry Identities

10/22/13

Use the substitute x= tan y to show that
∫1       1     dx =¶  +  1 0  (1+x2)2         8      4
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Trigonometry Identities

10/21/13

Prove that 1 + sin b - cos b =2sin1/2b cos1/2b +sin1/2b
Prove that 1 +sin b -cos b=2sin 1 b cos 1 b +sin 1 b                                               2          2           2   and hence solve 1 +sin b -cos b =0  0 = <b=<2¶
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Trigonometry Identities Trigonometry Tangent Half Angle Double Angle

10/08/13

What is the height of the building?
Jay is 120 meters from the base of a building and Mary is 40 meters from the base of the building. Jay's angle of elevation when looking at the top of the building is X and Mary's is 2X. What is... more
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Trigonometry Identities

10/07/13

(sin^6 x)/(1- tan^2 x) + (cos^6 x)/(1- cot^2 x)
simplify simplify simplify simplify ...............
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Trigonometry Identities Trigonometry

06/28/13

Complete the identity: csc(t)(sin(t) + cos(t)) = ?
Complete the identity: csc(t)(sin(t) + cos(t)) = ?
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Trigonometry Identities

06/14/13

if (1-a^2)sin-2acos=0,prove a^2(1+cos)=1-cos
Prove a^2(1+cos)=1-cos if 1-a^2)sin - 2acos =0
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Trigonometry Identities

05/23/13

use trigonometric identities to simplify the expression
sec^2(x)-sec^2(x) csc^2(x)
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Trigonometry Identities Trig

05/14/13

prove identity
Secx-tanxsinx=1/secx
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Trigonometry Identities Math Help Csc And Sec

05/13/13

Help with Trig Equations
csc2(x/2)=2sec(x) Please help me solve for x.
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Trigonometry Identities

03/19/13

show that cos(A-B) - cos(A+B) = 2sinA sinB
Anybody have  an idea how to solve that question... think needs to simplify first and use identities to solve.. but cant even start it..   please any help is welcome..
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Trigonometry Identities

01/27/13

(TanX)-1)/(Tan(X)+1) = (1-cot(X))/(1+cot(X))
Trig Identies
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Trigonometry Identities Pre Calculus

11/26/12

1/1-cosx+1/1+cosx=2csc^2x
Prove the Trigonometic identity
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Trigonometry Identities Pre Calculus

11/24/12

secx-tanxsinx=1/secx
Directions ask to prove the identity
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Expert Answers •2

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