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tan
(
π
4
+
1
2
cos
−
1
x
)
+
tan
(
π
4
−
1
2
cos
−
1
x
)
\tan\left(\frac{\pi}{4} + \frac{1}{2} \cos^{-1} x\right) + \tan\left(\frac{\pi}{4} - \frac{1}{2} \cos^{-1} x\right)
tan
(
4
π
+
2
1
cos
−
1
x
)
+
tan
(
4
π
−
2
1
cos
−
1
x
)
…
Mathematics
Problem
tan
(
π
4
+
1
2
cos
−
1
x
)
+
tan
(
π
4
−
1
2
cos
−
1
x
)
\tan\left(\frac{\pi}{4} + \frac{1}{2} \cos^{-1} x\right) + \tan\left(\frac{\pi}{4} - \frac{1}{2} \cos^{-1} x\right)
tan
(
4
π
+
2
1
cos
−
1
x
)
+
tan
(
4
π
−
2
1
cos
−
1
x
)
,
x
≠
0
x \neq 0
x
=
0
is equal to (a)
x
x
x
(b)
2
x
2x
2
x
(c)
2
x
\frac{2}{x}
x
2
(d)
x
2
\frac{x}{2}
2
x
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