" (क) यदि "00s^(-1)(x)/(a)+cos^(-1)(y)/(b)=theta" ,तो सिद कीजिए कि "(x^(2))/(a^(2))-(2xy)/(ab)cos theta+(y^(2))/(b^(2))=sin^(2)theta

If "cos"^(-1)(x)/(a)+"cos"^(-1)(y)/(b) =theta , then prove that (x^(2))/(a^(2)) -(2xy)/(ab) cos theta +(y^(2))/(b^(2))=sin^(2) theta .

cos^(-1)(x//a)+cos^(-1)(y//b)=theta ,then (x^(2))/(a^(2))-(2xy)/(ab)cos theta+(y^(2))/(b^(2))=

If cos ^(-1) .(x)/(a)+ cos ^(-1). (y)/(b) = theta then prove that (x^(2))/(a^(2)) -(2xy)/(ab) . cos theta+ (y^(2))/(b^(2)) = sin ^(2) theta .

If cos ^(-1) .(x)/(a)+ cos ^(-1). (y)/(b) = theta then prove that (x^(2))/(a^(2)) -(2xy)/(ab) . cos theta+ (y^(2))/(b^(2)) = sin ^(2) theta .

If cos^(-1)""x/a+cos^(-1)""y/b=theta , Prove that x^(2)/a^(2)-(2xy)/(ab)costheta+y^(2)/b^(2)=sin^(2)theta .

If Cos^(-1)(x/a)+Cos^(-1)(y/b)=theta,"then "x^(2)/a^(2)-(2xy)/(ab)costheta+y^(2)/b^(2)=

If cos ^(-1)\ (x)/(a) + cos^(-1)\ (y)/(b) = theta , then (x^(2))/(a^(2)) +(y^(2))/(b^(2))=?