Q: $3-15$ marks.

$[15$ pts$]$ Evaluate the following integrals

a$){\displaystyle \underset{0}{\overset{\frac{}{2}}{}}}(\frac{1-cos(x)}{1+cos(x)}{)}^{2}sin(x)dx$

b$){\displaystyle \underset{-1}{\overset{3}{}}}||x-2|-3x|dx$

c$){\displaystyle \underset{0}{\overset{2}{}}}{x}^{2}sinh(x^3-4)sin((x^3-4{)}^2)dx$