Prove the identity
- prove the identity trig
- prove the identity cot^2x-cos^2xu003dcot^2xcos^2x
- prove the identity ((1-tan theta)/(1-cot theta))^(2)u003dtan^(2)theta
- prove the identity (a+b)2u003da2+2ab+b2
- prove the identity (1/sinx - 1/tanx)^2
- prove the identity sin^2x+cos^2xu003d1
- prove the identity root 1+sina/1-sinau003dseca+tana
- prove the identity (seca-cosa)(cota+tana)u003dtanaseca
- prove the identity sin2a+cos2au003d1
- prove the identity calculator
