gennaallen482 gennaallen482

16-03-2020
Mathematics

contestada

what is cos^2x (sec^2x - 1)

Respuesta :

sweetyhere sweetyhere

16-03-2020

Answer:

cos²x.sec²x =1 (formula)

cos and sec are reciprocal to each other

cos²x=1/sec²x

now from the eq above,open the brackets and multiply

1-cos²2x

sin²2x

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