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Mathematics
Mathematics
Problem
If
4
cos
2
θ
=
1
4\cos^{2}\theta = 1
4
cos
2
θ
=
1
and
θ
\theta
θ
is an acute angle, then
θ
\theta
θ
is a)
75
∘
75^\circ
7
5
∘
b)
30
∘
30^\circ
3
0
∘
c)
60
∘
60^\circ
6
0
∘
d)
120
∘
120^\circ
12
0
∘
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