Without using trigonometric tables, find the values of: 60^ 45^ +… - Vidyadip

Question

Without using trigonometric tables, find the values of:
$\cos 60^{\circ} \cos 45^{\circ}+\sin 60^{\circ} \sin 45^{\circ}$

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Answer

$\frac{\sqrt{3}+1}{2 \sqrt{2}}$

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