SSC CGL 4 06 2019 Shift 1 Paper

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Question : 61 of 100

Marks: +1, -0

If

\sin \theta=\frac{p^{2}-1}{p^{2}+1},

then

\cos \theta

is equal to

$\ {2 p}/{1+p^{2}}$
$\ {p}/{p^{2}-1}$
$\ { p}/{1+p^{2}}$
$\ {2p}/{p^{2}-1}$

Solution:

\ {\in} \θ=\ {p^{2}-1}/{p^{2}+1}

\cos \θ=\ {2 p}/{p^{2}+1}

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