Math, asked by suhasbs9353, 3 months ago

The value of cos100° + Cos80°

Answers

Answered by Uniquedosti00017

0

Answer:

→ 0

cos100° + cos80°

= cos(90 + 10)° + cos(90 - 10)°

= -sin10° + sin10°

= 0

Step-by-step explanation:

formula used

cos(90 + ß) = - sinß

and

cos(90 -ß) = sinß.

$.$

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