Use the chain rule to compute the second derivative:

The first derivative is


Then the second derivative is


Then plug in π/4 for <em>x</em> :

Answer:
7
Step-by-step explanation:
Dy/dx = -y inx iny
(y in x in y) dx + dy = 0
(y in x in y ) dx = - dy
(in x )dx = - (1/ y in y) dy
you just need to integrate both sides
Hope this helps
Answer:
84
Step-by-step explanation:
80 + (80 * 5/100) = 84
simply take the 5% of 80 which is 4 and add it back to 80 which is 84
Answer:
The volume of the triangular prism would be 210.
Step-by-step explanation:
Formula:
Volume of a triangular prism = (1/2) x Base area x Height
or
V = 1/2 x B x H
Find the Base area = l x w
Base area = (10 x 7) 70
Base area = 70 sq.m
V = (1/2) x (70) x 6
V = <em>210</em>