Find the value of `sin^(2)""(pi)/(10)+sin^(2)""(4pi)/(10)+sin^(2)""(6pi)/10+sin^(2)""(9pi)/10`.

The value of (sin^(2)(pi)/(10)+sin^(2)(4 pi)/(10)+sin^(2)(6 pi)/(10)+sin^(2)(9 pi)/(10)) is

Find the value of sin^-1(sin(0pi/10))

Show that cos^(2)""(pi)/(10)+cos^(2)""(4pi)/(10)+cos^(2)""(6pi)/10+cos^(2)""(9pi)/10=2 .

(ii) Find the value of sin^(2). (pi)/(4) + sin^(2). (3pi)/(4) + sin^(2). (5pi)/(4) + sin^(2). (7pi)/(4) .

The value of sin""(pi)/(10)sin""(13pi)/(10) is

The value of sin""(pi)/(10)sin""(13pi)/(10) is

The value of sin""(pi)/(10)sin""(13pi)/(10) is

Show that sin^(2)""(pi)/(18) + sin^(2)""(pi)/(9) + sin^(2)""(7pi)/(18) + sin^(2)"" (4pi)/(9) = 2 .