Math, asked by blacksuperman, 1 month ago

sin20°cos70°+sin20°cos110°=?

Answers

Answered by missp1516

0

Step-by-step explanation:

tan140°

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Answered by chandrayeesaha3

0

Answer:

sin20°cos70°+sin20°cos110°

=sin²20°-sin²20°[as cos70°=cos(90°-20°)=sin20° and cos110°=cos(90°+20°)= -sin20°

=0

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