Math, asked by yashchauhan9238, 1 year ago

How do you use half angle formulas to find the exact value for cos 15 without using a calculator?

Anonymous: ___k off

Answers

Answered by MяMαgıcıαη

2

cos (A-B)= cosAcosB+sinAsinB

cos 15= cos (45-30)

and then put the values on the above formula

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