9sin^(2)30^(@)+sin^(2)45^(@)+sin^(2)60^(@)+sin^(2)90

Evaluate each of the following :- sin^(2)30^(@)+sin^(2)45^(@)+sin^(2)60^(@)+sin^(2)90^(@)

Find the value of the following: (i) "sin"^(2)30^(@)+"sin"^(2)45^(@)+"sin"^(2)60^(@)+"sin"^(2)90^(@) (ii) 2"sin"^(2)30^(@)-3cos^(2)45^(@)+cos^(2)60^(@)

Evaluate each of the following : 2cos^(2)60^(@)+3sin^(2)45^(@)-3sin^(2)30^(@)+2cos^(2)90^(@)

Evaluate : (sin^(2)30^(@)+sin^(2)45^(@)-4cot^(2)60^(@))/(2sin30^(@)cos30^(@)+(1)/(2)tan60^(@))

Evaluate : (sin^(2)30^(@)+sin^(2)45^(@)-4cot^(2)60^(@))/(2sin30^(@)cos30^(@)+(1)/(2)tan60^(@))

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

(2)/(3)(cos^(4)30^(@)-sin^(4)45^(@))-3(sin^(2)60^(@)-sec^(2)45^(@))+(1)/(4)cot^(2)30^(@)

Find the value of (4sin^(2)60^(@)-cos^(2)45^(@))/(tan^(2)30^(@)+sin^(2)0^(@))

Calculate : sec^(2)45^(@)-cot^(2)45^(@)-sin^(2)30^(@)-sin^(2)60^(@) .