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Question

If sinA=34, then what is the value of cosA?

A
45
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B
74
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C
43
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D
53
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Solution

The correct option is B 74
Given,
sinA=34
So, the perpendicular is 3 and the hypotenuse is 4.
Let's find the base.

42=32+Base216=9+Base2Base2=169=7Base=7

We know that, cosA=BaseHypotenuse

Thus,
cosA=74

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