Question

How do you evaluate `Cos(pi/4) -(pi/4)sin(pi/4)`?

Answer 1

`r(pi)=sqrt(2)/2-pi/4sqrt(2)/2=sqrt(2)/2(1- pi/4)=sqrt(2)/2((4- pi))/4`

Explanation:

Given :`r(pi/4)=cos(pi/4) -(pi/4)sin(pi/4)`
Evaluate:
Solution :
`r(pi)=sqrt(2)/2-pi/4sqrt(2)/2=sqrt(2)/2(1- pi/4)=sqrt(2)/2((4- pi))/4`