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Byju's Answer
Standard XII
Mathematics
Higher Order Derivatives
if y=xx-2sinx...
Question
if y=x
x
-2
sinx
, then find dy/dx
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Solution
y
=
x
x
-
2
sin
x
Let
y
=
u
-
v
⇒
dy
dx
=
du
dx
-
dv
dx
.
.
.
.
.
.
1
Now
,
u
=
x
x
⇒
log
u
=
log
x
x
⇒
log
u
=
x
log
x
⇒
1
u
du
dx
=
x
×
1
x
+
log
x
⇒
du
dx
=
u
1
+
log
x
⇒
du
dx
=
x
2
1
+
log
x
Now
,
v
=
2
sin
x
⇒
dv
dx
=
2
cos
x
Now
,
from
1
,
we
get
,
dy
dx
=
x
2
1
+
log
x
-
2
cos
x
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