If `x=a sin theta+b cos theta and y=a cos theta -b sin theta, \" prove that \" x^(2)+y^(2)=a^(2)+
Channel: Doubtnut
Date: 2020-01-03

If `x=a sin theta+b cos theta and y=a cos theta -b sin theta, \" prove that \" x^(2)+y^(2)=a^(2)+b^(2).`