me assume yu meen sine(theta)=x
Then yu want sine(theta)+kosine(theta)
sine^2+kosine^2(wotever)=1, so kosine(wotever)=sqrt[1-sine^2(wotever)]
thus, yu hav x+sqrt(1-x^2)
or yu mite wanna konvert sqrt tu sqrt[(x-1)*(x+1)/x^2]...become sqrt[(x-1)*(x+1)] /x