Math, asked by 1982vaibhavkr, 7 months ago

evaluate cos15°-sin15°

Answers

Answered by ravikumarshakthi7

0

Answer:

cos 15-sin15

cos(45-30) -sin(45-30)

{cos 45cos30+sin45sin30}-{sin45cos30-cos45sin30}

{√3\2√2+1/2√2}-√3/2√2-1/2√2}

2\2√2

=1/√2

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