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1.If tan x=n tan y and sin x=m sin y then prove that (m^2 - 1 )/ (n^2 - 1)=cos^2 x ?2.If x sin^3 A + y cos^3 A=sinAcosA and x sinA=y cosA.Prove that x^2+y^2=1 ? |
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Answer» 1.If tan x=n tan y and sin x=m sin y then prove that (m^2 - 1 )/ (n^2 - 1)=cos^2 x ? 2.If x sin^3 A + y cos^3 A=sinAcosA and x sinA=y cosA.Prove that x^2+y^2=1 ? |
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