Math, asked by klaus199, 11 months ago

cos square 15 degree minus sin square 75 degree

Answers

Answered by Anonymous

5

Answer:

Step-by-step explanation:

cos²15°-sin²75°

cos²(90-15)-sin²75°

sin²75°-sin²75°

=0

Answered by Rajbardhan

1

cos2( 90-75) - sin275

= sin2 75- sin275

=0

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