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(1 + cos π/8)(1 + cos 3π/8)(1 + cos 5π/8) (1 + cos 7π/8) is equal to

(a) 1/2

(b) cos π/8

(c) 1/8

(d) 1 + √2/2√2

1 Answer

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Best answer

Correct option: (c) 1/8

Explanation:

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