" 5.If "2sin^(2)A=sin^(2)60^(@)+sin^(2)45^(@)," then find the value of "sin A" ."

If tan^(2) 45^(@)-cos^(2) 60^(@)=x sin 45^(@) cos45^(@) tan 60^(@) , then find the value of x.

If a sin45^(@).cos45^(@).tan60^(@)=tan^(2)45^(@)-cos60^(@) , then find the value of a .

The value of sin^(2)60^(@)-sin^(2)30^(@) is:

If x sin 60^(@) cos^(2)30^(@) =(tan^(2)45^(@) sec60^(@))/("cosec"60^(@)) , then find the value of x.

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

Prove that "sin"^(2)30^(@),"sin"^(2)45^(@),"sin"^(@)60^(@) are in A.P.

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

If A = 60 ^(@) and B = 30 ^(@) , find the value of (sin A cos B+ cos A sin B)^(2) + (cos A cos B - sin A sin B )^(2)

Find the value of sin ^2 30^@ +cos^@ 45^@ .