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I'm asked to verify this identity. I've been going at it for a hour now with no successful results. 

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Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
4.6 4.6 (13 lesson ratings) (13)
If you want to prove from the left to the right, here is one way:
= (1-sin^2x + 1+sinx)/(1-sin^2x+3)
= (1+sinx)(1-sinx+1)/[(2+sinx)(2-sinx)]
= (1+sinx)/(2+sinx), after canceling 2-sinx.
Kirill Z. | Physics, math tutor with great knowledge and teaching skillsPhysics, math tutor with great knowledge...
4.9 4.9 (174 lesson ratings) (174)