what is the formula of cos (a - b)

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Abhishek Mishra

2 years ago

Cos(a - b) is one of the important trigonometric identities, also called the cosine subtraction formula in trigonometry. Cos(a-b) can be given as, cos (a - b) = cos a cos b + sin a sin b, where 'a' and 'b' are angles.

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