Question

the solution of cos15*

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Answer 1

Answer:

√3+1 / 2√2

Step-by-step explanation:

cos 15° can be written as cos(45°-30°)

cos(A-B) IDENTITY WE CAN USE SO WILL GET AS,

cos 45°cos30°+sin45°sin30°

1/√2.√3/2+1/√2.1/2

√3+1/2√2 is the answer

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