Math, asked by subash8519, 1 year ago

Sin50 - cos80 = root3 cos 70

Answers

Answered by ashwinikanher

6

LHS =sin40-cos70 =sin40- cos(90-20) =sin40-sin20 now use formula ... sin40-sin20=2cos30.sin10 =2 x √3/2 x cos80

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