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Mathematics
Mathematics
Problem
If
y
=
cos
−
1
(
5
cos
x
−
12
sin
x
13
)
y = \cos^{-1}\left(\frac{5 \cos x - 12 \sin x}{13}\right)
y
=
cos
−
1
(
13
5
c
o
s
x
−
12
s
i
n
x
)
, where
x
∈
(
0
,
π
2
)
x \in \left(0, \frac{\pi}{2}\right)
x
∈
(
0
,
2
π
)
, then
d
y
d
x
\frac{dy}{dx}
d
x
d
y
is (a) 1 (b) -1 (c) 0 (d) none of these
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