ics$/$Assignment Grade $1203os23=p,$ express, without using a calculator, the following in terms ot $1\mathrm{.}1cos2033\mathrm{.}1\mathrm{.}2sin293$ Expand $3\mathrm{.}2\mathrm{.}1sin(x+300)$ Using an appropriate compound angle formula. $3\mathrm{.}2\mathrm{.}2$ Without using a calculator, determine the value of $sin(x+300)-cos(x-150).$ Simplify to a single trigonometric expression $\frac{sinxsin(90+y)+cosxsin(180+y)}{cosxcos(y-360)-sin(-x)siny}$ Prove the identity: $,\frac{tanx+1}{sinxtanx+cosx}=sinx+cosx$ STION $4$ the function $f(x)=cos2x$ and $g(x)=sin(x+45)$ for xin$[-180$;$180].$