Find the exact value of sincos138Solutionsolution sincos138

Find the exact value of sin(cos^-13/8)

Solution

solution:

sin(cos^-1(3/8))

firstly find cos^-1(3/8)

cos^-1(3/8)=cos(0.375)=1.2 rad

now

putting value of cos in sine input

sin(1.2)=0.932

answer

0.932