Question

sin2A + cos2A = 1. prove the statenent?

Answer 1

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Answer 2

Answer:

sin2A+cos2A=1. Its a standard identity.

We know that sinA=HP​ and cosA=HB​

Hence sin2A=H2P2​ and cos2A=H2B2​

Hence adding the above given functions sin2A+cos2A we get

sin2A+cos2A=H2H2​=1

Using P2+B2=H2 by Pythagoras Theorem

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Step-by-step explanation: