SSC CGL Model Paper 16

Question : 69 of 100

Marks: +1, -0

What is the simplified value of

[2 / (\cot A - \tan A)]

Solution:

2 / {\cot A - \tan A}=2/{{\cos A}/{\sin A}-{\sin A}/{\cos A}}

={2 \sin A \cos A}/{\cos^2 A - \sin^2 A }

{\sin 2 A}/{\cos 2 A}=\tan2A

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