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(Q*9+cos0*cos21,tan)/(sqrt(1+x^(2))[sin ...

(Q*9+cos0*cos21,tan)/(sqrt(1+x^(2))[sin cos(cos^(-1)x)+sin(cot^(-1)x)^(2))]^(1/2)

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If 0ltxlt1 then sqrt(1+x^(2))[{x cos (cot^(-1)x)+sin(cot^(-1)x}^(2)-1]^(1/2)

cos[tan^(-1) {sin(cot^(-1) x)}] =

tan (cos ^(-1) x) = sin (cot ^(-1) ""(1)/(2))

cos [ tan^(-1){sin (cot^(-1)x)}] =

{ cos (sin ^(-1) x)}^(2) ={sin (cos ^(-1) x)}^(2)

If 0 < x < 1, then : sqrt(1+x^1)[{ x cos(cot^-1x) + sin (cot^-1 x}^2 - 1]^(1//2)

sin(Cot^(-1)(cos(Tan^(-1)x)))=

sin[cot^(-1){cos(tan^(-1)x)}]=