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Mathematics
Mathematics
Problem
If
4
sin
−
1
x
+
cos
−
1
x
=
π
4 \sin^{-1} x + \cos^{-1} x = \pi
4
sin
−
1
x
+
cos
−
1
x
=
π
, then
x
x
x
is equal to (a) 0 (b)
1
2
\frac{1}{2}
2
1
(c)
−
3
2
-\frac{\sqrt{3}}{2}
−
2
3
(d)
1
2
\frac{1}{\sqrt{2}}
2
1
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