Question

prove that (1-sin2Q)sec2Q=1​

Answer 1

(1-sin2Q)sec2Q=1

LHS, (1-sin2Q)sec2Q

Now we know that sec theta=1/sin theta. So,

1-sin2Q×1/sin2Q.

Here sin2Q cancels out.

=> 1=RHS. Hence,proved.

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