Question

what is the value of cos15°
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Answer 1

● Cos 15° = √3+1/2√2

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Answer 2

Answer:

cos 90° = √(0/4) = 0. Substitute the value of sin 30, sin 45, cos 30 and cos 45 degrees, then equation (2) will becomes. Cos (45 – 30) = 1/√2 .

Step-by-step explanation:

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