Question: Find the exact value sin 40 + sin 130 + sin 220 + sin 310 87. Find the exact value of: sin 40 + sin

Find the exact value

sin 40 + sin 130 + sin 220 + sin 310

Find the exact valuesin 40 + sin 130 + sin 220 +

87. Find the exact value of: sin 40 + sin 130 + sin 220 + sin 310

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