The value of `sin^2 5^@ + sin^2 10^@ + sin^2 15^@ + sin^2 20^@ + ... + sin^2 90^@` is:

sin^2 75^@-sin^2 15^@ =

The value of sin^2 1^@ + sin^2 3^@ + sin^2 5^@ +…+ sin^2 87^@ + sin^2 89^@ is

The value of sin^2 30^@ cos^2 45^@ + 5 tan^2 30 + 3/2 sin^2 90^@ - 3 cos^2 90^@ is

The value of sin^(2) 63^(@) + sin^(2) 27^(@) is

The value of sin^(2) 1^(@) + sin^(2) 2^(@) + sin^(2) 3^(@)+ . . . . + sin^(2) 89^(@) + sin ^(2) 90^(@) is

Find the value of 2sin 30^@ +cos 0^@ +3 sin 90^@ .

Write the value of 2sin 75^(@) sin15^(@)

Find the value of sin^(2)5^(@)+ sin^(2)10^(@)+ sin^(2)15^(@)+* * * +sin^(2)90^(@) .

What is the value of sin^(2) 15^(@) + sin^(2) 20^(@) + sin^(2)25^(@) + ……… + sin^(2) 75^(@) ?