[9.sin((1)/(2)cos^(-1)(4)/(5)),=],[1)-(1)/(sqrt(10)),2)(1)/(sqrt(10))quad 3)(1)/(10)quad 4)-(1)/(10)]

sin(cos^(-1)(4/5))

Evaluate sin(1/2cos^(-1)(4/5))

sin((1)/(2)cos^(-1).(4)/(5)) is equal to

cos[sin^(-1)(-4//5)-cos^(-1)(4//5)]=

cos[2cos^(-1)((1)/(5))+sin^(-1)((1)/(5))] =

If (sin^(4))/(2)+(cos^(4))/(3)=(1)/(5) then

(i) If sin ^(-) x + sin ^(-1) y = pi//2 , then prove that : cos^(-1) x = sin^(-1) y (ii) Prove that : sin ((1)/(2) cos^(-1).(4)/(5))= (1)/sqrt(10) (iii) Prove that : tan ((1)/(2) cos^(-1).(sqrt(5))/(3)) = (3-sqrt(5))/(2)

If (sin^(4)x)/(2)+(cos^(4)x)/(3)=(1)/(5) then

If (sin^(4)x)/(2)+(cos^(4)x)/(3)=(1)/(5) then