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cos^-1 x + cos^-1 y= π/2 হলে, sin^-1 x + sin^-1 y কত?

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sin^-1 x + sin^-1 y = π/2 হলে কোনটি সঠিক?

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tan^-1 x + tan^-1 y = tan^-1(x+y/1–xy) সূত্রটি কোন শর্তে বৈধ?

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sin^-1 x + tan^-1 x + cot^-1 x + cos ^-1 x =?

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∫ √e^x dx =?

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d/dx (sin^-1x) =?

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∫ 7 dx=?

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∫(sinx + cosx)/√(1+sin2x) dx =?

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∫ 1/√x dx =?