The value of the expression `2^199 sin (pi/199)sin((2pi)/199)sin((3pi)/199)………..sin((198pi)/199))=`

Value of expression sin(pi/9)+sin((2pi)/9)+sin((3pi)/9)+...+sin((17pi)/9)=

sin^(-1)(sin((2pi)/3))

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

the value of sin(pi/7)+sin((2pi)/7)+sin((3pi)/7) is

The value of sin(pi/14)sin((3pi)/14)sin((5pi)/14) is

The value of sin(pi/14)sin((3pi)/14)sin((5pi)/14) is

The value of sin\ pi/16 sin\ (3pi)/16 sin\ (5pi)/16 sin\ (7pi)/16 is

The value of the expression sin^(-1)(sin(22pi)/7)cos^(-1)(cos(5pi)/3)+tan^(-1)(tan(5pi)/7)+sin^(-1)(cos2) is (17pi)/(42)-2 (b) -2 (-pi)/(21)-2 (d) non eoft h e s e

Prove that: sin(pi/5)sin( (2pi)/5)sin(3pi/5)sin(4pi/5)=5/(16)

Prove that: sin ((pi)/(7))+sin((2pi)/(7)) + sin((8pi)/(7)) + sin((9pi)/(7))=0