`cos^(-1)(1/sqrt2)`

Find the principal value of the following cos e c^(-1)(2) (ii) tan^(-1)(-sqrt(3)) cos^(-1)(1/(sqrt(2)))

Find the value of the following inverse trigonometric expression: cos^(-1)(1/(sqrt(2))("cos"(9pi)/10-"sin"(9pi)/10))

For the principal value, evaluate tan^(-1)(-1)+cos^(-1)(-1/(sqrt(2)))

Find the principal value of: cos^(-1)(-1/(sqrt(2)))

Find the principal value of each of the following: (i) cos^(-1)(-(sqrt(3))/2) (ii) cos^(-1)(-1/(sqrt(2)))

Find the principal value of cot^(-1)(-sqrt3)+2cosec^(-1)(-2)+cos^(-1)(-sqrt3/2)

Prove that tan^(-1)((sqrt(1+x)-sqrt(1-x))/(sqrt(1+x)-sqrt(1-x)))=pi/4-1/2cos^(-1),-1/(sqrt(2))lt=xlt=1

if cos^(-1)((1)/(sqrt(2))(cos((7pi)/(5))-sin((2pi)/(5)))=(ppi)/(q) (where p,q are in lowest form), then value of (q-p) is

Solve sin^(-1) x - cos^(-1) x = cos ^(-1)(sqrt3/2) .

The value of tan(1/2 cos^(-1)(2/(sqrt(5)))) is