tan3x - tan2x- tanx = tan3xtan2xtanx

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sin(X)sec(x)=1-(cos^2)x/sin(X)cos(X)

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This is for my trig class. Thanks for the help!

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This is for my trig class. Thanks for the help!

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This is for my trig class, and the directions say to verify the identity. Thanks so much.

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1) given the double angle identity for cosine: cos2θ=cos2θ-sin2θ Prove: cos3θ = cos3θ - 3cosθsin2θ and: cos4θ = cos4θ - 6cos2θsin2θ + sin2θ 2)...

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2sin^2x - 1÷ sinxcosx = tanx-cotx

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(1-cos^2x)(cot^2+1) = 1

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cosx = (1- tan^2 x/2) / 1 + tan^2 x/2) Completely stuck.

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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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Prove 1 - sin2x / cosx = sin2x / 2sinx I tried do both LHS and RHS. Got stuck after a step or two.

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Prove sec2x = 1 + tan2x I did R.H.S = 1 + sin2x / cos2x = 1 + (1 - cos2x) / (1 - sin2x) = 1 + cot2x = ??? I think I'm doing it right,...

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∫1 1 dx =¶ + 1 0 (1+x2)2 8 4

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Prove that 1 +sin b -cos b=2sin 1 b cos 1 b +sin 1 b ...

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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 the...

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simplify simplify simplify simplify ...............

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

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Prove a^2(1+cos)=1-cos if 1-a^2)sin - 2acos =0

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sec^2(x)-sec^2(x) csc^2(x)

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Secx-tanxsinx=1/secx