Math, asked by 8381989695, 8 months ago

cos 90° =1–2 sin^2 45º = 2 cos^2 45° -1

Answers

Answered by lakshmisaradaa

0

Answer:

0 = 1 - 2*1/2 = 2*1/2 - 1

0 = 1- 1 = 1-1

0= 0 = 0

answer is zero (0)

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