JEE MATHEMATICS MCQ: MULTIPLE AND SUBMULTIPLE ANGLES

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Application +4 | -1

a^2-2 a \cos x+1=674

and

\tan (x / 2)=7

then the integral value of

a

View answer and explanation

Correct option: A

Option A (25) is correct because solving the equation

a^2-2 a \cos x+1=674

with

\tan (x / 2)=7

yields

a=25

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