Mathematics, 27.03.2020 01:06 juniorcehand04

2 cos^215° - 1
use a double angle identity to find the exact value of the expression

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2 cos^215° - 1
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2 cos^215° - 1 use a double angle identity to find the exact value of the expression

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2 cos^215° - 1
use a double angle identity to find the exact value of the expression