Question

value of Cos 15°.....​

Answer 1

Step-by-step explanation:

$\cos(60 - 45) = \cos(60) \times \cos(45) + \sin(60) \times \sin(45)$

$\cos(15) = 1 \div 2 \times 1 \div \sqrt{2} + \sqrt{3} \div 2 \times 1 \div \sqrt{2}$

$\cos(15) = 1 \div 2 \sqrt{2} + \sqrt{3} \div 2 \sqrt{2}$

taking L C M and yours final answer

Answer 2

cos(60-45)=cos(60)xcos(45)+sin(60)

cos(15)=1%2x1%√2+√3%2x1%cos(15)=1%2√2+√3%2√2

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