" sin "15^(@)" is equal to "

The value of sqrt(2)(cos15^(@)-sin15^(@)) is equal to a) sqrt(3) b) sqrt(2) c)1 d)2

The value of (cos ^(6)5^(@)-15 cos ^(4) 5^(@) sin ^(2)5^(@)+15 cos ^(2)5^(@)sin ^(4) 5^(@)-sin ^(6)5^(@)) is equal to-

The value of (sqrt(3))/(sin 15^(@)) - (1)/(cos 15^(@)) is equal to

Select and write the correct answer from the given alternatives in each of the following:Thevalue of sin^2(5^@)+sin^2(10^@)+sin^2(15^@)+………..+sin^2(85^@)+ sin^2(90^@) is equal to

The value of sin^2 75^@-sin^2 15^@ is equal to:

The value of cos15^@-sin15^@ is equal to

The value of sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+ . . . .+sin^(2)90^(@) is equal to

sin ^(2) 5 ^(@) + sin ^(2) 10 ^(@) + sin^(2) 15 ^(@) + ... + sin ^(2) 90^(@) is equal to : a) 8 (1)/(2) b) 9 c) 9 (1)/(2) d) 4 (1)/(2)

The value of ((sqrt(3))/(sin15^(@)))-((1)/(cos15^(@))) is equal to