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Simplify the expression by using a double-angle formula. −2cos2π91

Simplify the expression by using a double-angle formula. −2cos2π91
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Simplify the expression by using a double-angle formula. −2cos2π91

User Nids Barthwal
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1 Answer

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The Answer of −2cos2π91 = is -2
User Raghvendra Kumar
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