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Trigonometry question bank (Quantitative Aptitude)

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Q1.

If for real values of $x$,$\cos \theta = x + \frac{1}{x}$,then

(A)
$\theta$ is an acute angle
(B)
$\theta$ is a right angle
(C)
$\theta$ is an obtuse angle
(D)
No value of $\theta$ is possible
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Q2.

The equation $(a + b)^2 = 4ab \sin^2 \theta$ is possible only when

(A)
$2a = b$
(B)
$a = b$
(C)
$a = 2b$
(D)
None of these
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