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Joshweir · Answer 1 · 2019-07-04T01:18:14+0000

csc Ф=1/sinФ, so sinФ=7/8
imagine a right triangle , the leg opposite to Ф is 7, the hypotenuse is 8, you can find the leg adjacent to Ф: √(8²-7²)=√15
cotФ=adjacent/opposite=√15/7
the answer is B.

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