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which of the following is an identity tan^2x+cos^2x=1, sin^2x cot^2x + cos^2 tan^2x = 1, sinx - cosx +1 = tanx, (1-2sin^2x)csc^x = 4cos^x-2

Respuesta :

The first one isnt  because sin^2 x + cos^2 x = 1

the second one is an identity because it simplifies to sin^2 x + cos^2 x = 1

Answer:

B

Step-by-step explanation:

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