4. `cos^-1(cos((7pi)/4))` is equals to:

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

cos^(-1)(cos((7pi)/6)) is equal to (A) (7pi)/6 (B) (5pi)/6 (C) pi/3 (D) pi/6

The principal value of cos^(-1)("cos"(7pi)/6) is

If tan(pi cos theta )= cot (pi sin theta ) ,then cos^(2)(theta -pi//4) is equal to

The principal values of cos^(-1)(-sin((7pi)/6)) is

The value of cos[1/2cos^(-1)(cos(-(14pi)/5))]\ is/are a. cos(-(7pi)/5) b. sin(pi/(10)) c. cos((2pi)/5)\ d. -cos((3pi)/5)

Evaluate the following: cos^(-1)(cos((7pi)/6))

The value of 2"sin"^(2)(pi)/(6)+"cosec"^(2)(7pi)/(6)."cos"^(2)(pi)/(3) is equal to

Evaluate each of the following: (i) cos^(-1){cos(-pi/4)} (ii) cos^(-1)(cos((5pi)/4)) (iii) cos^(-1)(cos((4pi)/3))

The principal values of cos^(-1)(-sin(7pi)/(6)) is