If 4 -2\sin^2x -5 \cos x=0; 0

SSC CGL Model Paper 17

Question : 67 of 99

Marks: +1, -0

4 -2\sin^2x -5 \cos x=0; 0 < x < 90°

; Find

\sin x + \cos x=?

Solution:

x = 60° satisfies the given equation in

\sin 60°+\cos 60°

=√3/2+1/2={√3+1}/2

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