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Find the Exact Value cos⁡75∘cos⁡15∘+sin⁡75∘sin⁡15∘\cos 75 ^ { \circ } \cos 15 ^ { \circ } + \sin 75 ^ { \circ } \sin 15 ^ { \circ }

Question 81

Essay

Find the exact value. cos⁡75∘cos⁡15∘+sin⁡75∘sin⁡15∘\cos 75 ^ { \circ } \cos 15 ^ { \circ } + \sin 75 ^ { \circ } \sin 15 ^ { \circ }

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