`sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+ . . . .+sin^(2)85^(@)+sin^(2)90^(@)` is equal to

sin^(2)21^(@) + sin^(2) 69^(@) is equal to

sin^(2) 5^(@)+sin^(2) 10^(@) +sin^(2)15^(@)+...+sin^(2) 180^(@)=

sin^(2)24^(@)-sin^(2)6^(@) is equal to

The value of sin^(2)1^(@)+sin^(2)2^(@)+sin^(2)3^(@)+....+sin^(2)88^(@)+sin^(2)89^(@) is equal to

sin^(2)(35^(@))+sin^(2)(55^@) is equal to

sin^(2)5^(@) + sin^(2)25^(@) + sin^(2)45^(@) + sin^(2) 65^(@) + sin^(2) 85^(@) is equal to:

sin^(2)17.5^(@)+sin^(2)72.5^(@) is equal to

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

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)