" 7."cos^(-1)((1)/(2))+2sin^(-1)((1)/(2))*^(251)

cos ^(-1) (1)/(2)+2 sin ^(-1) (1)/(2)=

sin(sin^(-1)(1)/(2)+cos^(-1)(1)/(2))

For the principal values,evaluate each of the following :(cos^(-1)1)/(2)+2(sin^(-1)1)/(2) (ii) cos^(-1)((1)/(2))-2sin^(-1)(-(1)/(2))

cos [cos^(-1)(-1/2)-sin^(-1)(1/2)]

(cos^(-1)(41/49))/(sin^(-1)(2/7))

Evaluate "cos"^(-1)(1/(2))+2"sin"^(-1)(1/(2)) .

For the principal values, evaluate each of the following : (i) cos^(-1) (1/2)+2sin^(-1) (1/2) (ii) cos^(-1)(1/2)-2sin^(-1)(-1/2)

cos^(-1)(1/2)+2sin^(-1)(1/2) is equal to

(cos^(-1)(41/49))/(sin^(-1)(2/7))=