SSC CGL Model Paper 11

© examsiri.com

Question : 51 of 100

Marks: +1, -0

QUANTITATIVE APTITUDE

\cos{2\θ}. \cosec{4\θ} = 1

, Find

\sin{2\θ} + \cos{4\θ }= ?

2
1
$∞$
0

Solution:

If

\cos\α.\cosec\β=1

then

\α+\β=90°

So

{2\θ+4\θ}=90°⇒\θ=15°

∴\sin 30°+\cos 60°

=1/2+1/2=1

© examsiri.com

Go to Question:

Prev Question

Next Question