Find the value of `sin^(2)64+sin^(2)26`

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

Find the value of sin^(2)1^(@)+sin^(2)2^(@)+sin^(2)3^(@)+ ----+sin^(2)87^(@)+sin^(2)88^(@)+sin^(2)89^(@)+sin^(2)90^(@) .

Find the value of sin^(2)42^(@)-sin^(2)12^(@) .

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

Find the value of sin^(2)20^(@)+sin^(2)70^(@)

If cos A+cos^(2)A=1, find the value of sin^(2)A+sin^(4)A

Find the value of sin^(2) 45^(@) - sin^(2) 15^(@)

Find the value of sin1^(@).sin2^(@).sin3^(@)…sin180^(@) .

If sin A = cos A , find the value of 2tan^(2)A + sin^(2)A +1 .