`2sin^(-1)((1)/(8))=`

State with arguments , in which of the following cases the inverse circular functions are undefined : "cosec"^(-1) ((1)/(2)) , cos ^(-1) (-(3)/(2) ), sin ^(-1)((1.7)/(1.8)) , cot ^(-1) (7) , sec ^(-1) ((4)/(5))

4.Prove that sin^(2)((pi)/(8))+sin^(2)((3 pi)/(8))=1

int(dx)/(sqrt(9x-4x^2)) equals (A) 1/9sin^(-1)((9x-8)/8)+C (B) 1/2sin^(-1)((8x-9)/9)+C (C) 1/3sin^(-1)((9x-8)/8)+C (D) 1/2sin^(-1)((9x-8)/9)+C

int(dx)/(sqrt(9x-4x^2)) equals(A) 1/9sin^(-1)((9x-8)/8)+C (B) 1/2sin^(-1)((8x-9)/9)+C (C) 1/3sin^(-1)((9x-8)/8)+C (D) 1/2sin^(-1)((9x-8)/9)+C

2sin^(2)(8(1^(0))/(2))+4 cos 16^(0) sin(7(1^(0))/(2)) sin (8(1^(0))/(2))+cos32^(0)=

sin(2sin^(-1) 0.8)=

sin(2sin^(-1) 0.8)=

sin(2sin^(-1) 0.8)=

sin(2sin^(-1) 0.8)=