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OpenStudy (anonymous):
[1 + cos(π/8)] [1 + cos(3π/8)] [1 + cos(5π/8)] [1 + cos(7π/8)] is equal to A. π/2 B. (1 + √2)/2√2 C. 1/2 D. 1/8
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OpenStudy (anonymous):
D.
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