The value of `cos e cpi/(18)-4sin(7pi)/(18)` is

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

The value of cos""(pi)/(11)+cos""(3pi)/(11)+cos""(5pi)/(11)+cos""(7pi)/(11)+cos""(9pi)/(11), is

The value of sinpi/(14)sin(3pi)/(14)sin(5pi)/(14)sin(7pi)/(14)sin(9pi)/(14)sin(11pi)/(14)sin(13pi)/(14) is equal to___________

If f( theta ) = sin ^(3)theta + sin ^(3)( theta + (2pi)/(3)) + sin ^(3)( theta + (4pi)/(3)) then the value of f((pi)/(18)) + f((7pi)/(18)) is ___________.

Find the value of cos^2pi/(16)+cos^2(3pi)/(16)+cos^2(5pi)/(16)+cos^2(7pi)/(16)dot

The value of (1+cospi/8)(1+cos(3pi)/8)(1+cos(5pi)/8)(1+cos(7pi)/8)i s (a)1/4 (b) 3/4 (c) 1/8 (d) 3/8

Find the value of cos^(-1)(cos""(pi)/(7)cos""(pi)/(17)-sin""(pi)/(7)sin""(pi)/(17))

Find the value of (cos .pi/7 cos . pi/17 - sin .pi/7 sin . pi/17)

The value of cos^(-1)(cos(5pi)/3)+sin^(-1)(sin(5pi)/3)"is"