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If cos(x)cos(π/7)+sin(x)sin(π/7)= - (√2)/2, then x can equal: (Check all that apply) A. (π/4)+(π/7)+2nπ B. (5π/4)+(π/7)+2nπ C. (7π/4)+(π/7)+2nπ D. (3π/4)+(π/7)+2nπ
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Dec 24, 2020
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If cos(x)cos(π/7)+sin(x)sin(π/7)= - (√2)/2, then x can equal:
(Check all that apply)
A. (π/4)+(π/7)+2nπ
B. (5π/4)+(π/7)+2nπ
C. (7π/4)+(π/7)+2nπ
D. (3π/4)+(π/7)+2nπ
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Leroy Mikenzi
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ReFocus
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