Math, asked by aryan567848, 1 year ago

find cos 75* degree by using the formula cos a + b is equal to cos a cos b - sin a sin b

Answers

Answered by bhawnau071

1

Cos(45+30)=cos45.cos30-sin45.sin30
1/root2.root3/2-1/root2.1/2=root3-1/2root2

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