Asked by Anonymous
(cos^4x -sin ^4 x)/(sin^2x)=cot^2x -1
Prove true
Prove true
Answers
Answered by
DonHo
Take a look at this. Follow the steps. If you're lost just post back here.
http://www.symbolab.com/solver/trigonometric-identity-calculator/%5Cfrac%7B(cos%5E%7B4%7D(x)-sin%5E%7B4%7D(x))%7D%7Bsin%5E%7B2%7D(x)%7D%3Dcot%5E%7B2%7D(x)-1/?origin=button
http://www.symbolab.com/solver/trigonometric-identity-calculator/%5Cfrac%7B(cos%5E%7B4%7D(x)-sin%5E%7B4%7D(x))%7D%7Bsin%5E%7B2%7D(x)%7D%3Dcot%5E%7B2%7D(x)-1/?origin=button
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