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" If "cos^(-1)(x)/(2)+cos^(-1)(y)/(3)=al...

" If "cos^(-1)(x)/(2)+cos^(-1)(y)/(3)=alpha," then prove that "9x^(2)-12xy cos

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If "cos"^(-1) x/(2)+"cos"^(-1) y/(3)=theta , then prove that 9x^(2)-12xy " cos "theta+4y^(2)=36" sin "^(2)theta

If cos^(-1) (x/2) + cos^(-1) (y/3) =alpha then prove that 9x^2-12xycosalpha+4y^2=36sin^2alpha .

If cos^(-1)((x)/(2))+cos^(-1)((y)/(3))=theta, prove that 9x^(2)-12xy cos theta+4y^(2)=36sin^(2)theta

If cos^(-1)(x)/(2)+cos^(-1)(y)/(3)=theta then the maximum of 9x^(2)-12xy costheta + 4y^(2) is

If cos^(-1)(x)/(2)+cos^(-1)(y)/(3)=theta then the maximum of 9x^(2)-12xy costheta + 4y^(2) is

If cos ^(-1) ""(x)/(2) + cos ^(-1) "" (y)/(3) = theta, then prove that 9x ^(2) - 12 xy cos theta + 4y ^(2) = 36 sin ^(2) theta

If cos^(-1).(x)/(2) + cos^(-1).(y)/(3) = (pi)/(6) , then prove that (x^(2))/(4) - (xy)/(2sqrt3) + (y^(2))/(9) = (1)/(4)

If cos^(-1).(x)/(2) + cos^(-1).(y)/(3) = (pi)/(6) , then prove that (x^(2))/(4) - (xy)/(2sqrt3) + (y^(2))/(9) = (1)/(4)

If cos^(-1)(x/a)+cos^(-1)(y/b)=alpha, prove that (x^2)/(a^2)-2(x y)/(a b)cosalpha+(y^2)/(b^2)=sin^2alpha

If cos^(-1)(x/a)+cos^(-1)(y/b)=alpha, prove that (x^2)/(a^2)-2(x y)/(a b)cosalpha+(y^2)/(b^2)=sin^2alpha