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Problem
Problem
The general solution of
4
sin
4
x
+
cos
4
x
=
1
4 \sin^4 x + \cos^4 x = 1
4
sin
4
x
+
cos
4
x
=
1
is a.
(
2
n
+
1
)
π
2
(2n+1) \frac{\pi}{2}
(
2
n
+
1
)
2
π
b.
n
π
n\pi
nπ
c.
n
π
±
sin
−
1
2
5
n\pi \pm \sin^{-1} \sqrt{\frac{2}{5}}
nπ
±
sin
−
1
5
2
d. None of these
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