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

The value of "cosec".(pi)/(18)-4 sin""(7pi)/(18) is ____________

The value of sin 18^@

The value of cos ec((pi)/(18))-sqrt(3)sec((pi)/(18)) is a

The value of (tan pi)/(18)+2*(tan(7 pi))/(18) 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 ___________.

The value of (sin pi) / (18) + (sin pi) / (9) + (sin (2 pi)) / (9) + (sin (5 pi)) / (18) is

The value of (tan pi)/(18)*(tan(3 pi))/(18)+(tan(3 pi))/(18)*(tan(5 pi))/(18)+(tan(pi))/(18)*(tan(5 pi))/(18) is equal to (1)0(3)sqrt(3)(2)1(4)-1

let cos((pi)/(7)),cos((3 pi)/(7)),cos((5 pi)/(7)), the roots of equation 8x^(3)-4x^(2)-4x+1=0 then the value of sin((pi)/(14)),sin((3 pi)/(14)),sin((5 pi)/(14))