1) To calculate the derivative of y = sqrt(3arctan
x),we'll apply the chain rule:
y' = [sqrt(3arctan
x)]'*(3arctan x)'
We'll see 3arctan x as an entity and
we'll differentiate the sqrt:
(sqrt t)' = 1/2sqrt
t
y' = [1/2sqrt(3arctan
x)]*[3/(1+x^2)]
y' =
3/[2*(1+x^2)*sqrt(3arctan x)]
2) We'll
calculate the derivative of y = 17 arctan (sqrt x) using the chain rule
also:
y' = [17 arctan (sqrt x)]'*(sqrt
x)'
y' =
[17/(1+(sqrtx)^2)]*(1/2sqrtx)
y' =
17/2(sqrtx)*(1+x)
3) We'll calculate the
derivative of y = arcsin(4x + 2)using the chain rule
also:
y = [arcsin(4x
+ 2)]'*(4x+2)'
We'll see 4x + 2 as an
entity:
y' =
{1/sqrt[1-(4x+2)^2]}*(4)
We'll expand the
square:
y' = 4/sqrt(1-16x^2 - 8x -
4)
We'll combine like
terms:
y' = 4/sqrt(-3-16x^2 -
8x)
4) We'll calculate the derivative of y
= arccos(e^8x) using the chain rule
also:
y =
arccos(e^8x)
We'll
put (e^8x) =
t
(arccos t)' =
1/sqrt(1-t^2)
y' =
[arccos(e^8x)]'*(e^8x)*(8x)'
y'
=
[1/sqrt(1-(e^8x)^2)]*(e^8x)*(8)
y'
=
8(e^8x)/[sqrt(1-(e^8x)^2]
5)
We'll calculate the derivative of y = arctan [x+sqrt(x^2+1)] using the chain rule
also:
y = arctan
[x+sqrt(x^2+1)]
We'll put x+sqrt(x^2+1) =
t
(arctan t)' = 1/(1+t^2)
y' =
{arctan [x+sqrt(x^2+1)]}'*[x+sqrt(x^2+1)]'
y'
= {1/{1+[x+sqrt(x^2+1)]^2}}*[1 +
2x/2sqrt(x^2+1)]
6) We'll calculate the
derivative of y = 5arccot(t)
+ 5arccot(1/t)using the chain rule
also:
h(t)
= 5arccot(t)
+ 5arccot(1/t)
h'(t) =
-5/(1+t^2) - 5/[1+(1/t)^2]
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