3 Answered Questions for the topic Math, Trignometry, Precalculus, Trig Identities

Math, Trignometry, Precalculus, Trig Identities

03/13/18

Can you help to prove this?

(sinx+1)(sinx-1)=cotx*sinx-2cosx
Math, Trignometry, Precalculus, Trig Identities

03/04/18

How do you solve for x in 2sin^(2)(2x)+3cos(2x)=3

I have tried solving with half-angle formula and factoring and can not get an answer
Math, Trignometry, Precalculus, Trig Identities

01/24/18

How to prove that (sin4x/1-cos4x)×(1-cos2x/cos2x)=tanx

Please help me i have been stuck on this for 2 hours now and its depressing me to unreasonable depths.

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