Question

Please someone solve this ​

Answer 1

Answer:

Step-by-step explanation:

take $sin^{2}x$ common from top and $cos^{2}x$  from down.

then ,1 - 2 $sin^{2}x$ = cos2x

          2$cos^{2}x$ - 1 = cos2x

so you will get

$sec^{2}x$ - $tan^{2}x$ which is equal to 1

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