選択した画像 prove that x^-1/x^-1 y^-1 x^-1/x^-1-y^-1=2y^2/y^2-x^2 671484 josspixecti

If x and y are reals such that 0 ≤ x 2 y 2 ≤ π , how does one prove that cos x cos y ≤ 1 cos x y ?To ask Unlimited Maths doubts download Dou...

√1000以上 480/520 simplified 222155-480/520 simplified josspixecti

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