Find general solution to equation cos x = – 1/√2.

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answerhappygod
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Find general solution to equation cos x = – 1/√2.

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a) x = 2nπ±7π/4
b) x = 2nπ±3π/4
c) x = 2nπ±π/4
d) x = 2nπ±π/3
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