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Byju's Answer
Standard XII
Mathematics
Implicit Differentiation
What is the m...
Question

What is the measure (in degrees) of angle A?
534355_f9fe49aea2344ca592f6b25e6e2ac346.png

A
53.4
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B
58.7
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C
63.6
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D
70.1
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E
80.3
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Solution

The correct option is E 80.3
From figure, we have
cosA=102+132−1522×10×13
=100+169−225260
=44260
=1165
Therefore A=cos−1(1165)=80.3

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