67.4(cos66^(^^)O+sin84^(^^)O)=

cos66^(@)+sin84^(@)=

cos66^(@)+sin84^(@)=

cos 66^(@) + sin 84^(@) =

Prove that 4(cos66^(@)+sin84^(@)) = sqrt(3) + sqrt(15) .

cos66^(@)+sin84^(@)=(sqrt(15)+sqrt(3))/(k) .Then k=

cos66^(0)+sin84^(0)=(sqrt(15)+sqrt(3))/(K) then K=

What is the values of the following? ( sin 24^(@) +cos 66^(@)) (sin 24^(@) -cos66^(@))

2 cos 54^(@) * sin 66^(@) =

Verify that: ( i ) cos60o=cos^(2)30o-sin^(2)30o=(1)/(2) (ii) 4(sin^(4)30o+cos^(4)30o)-3(cos^(2)45o-sin^(2)90o)=2

Evaluate the following: (i)(4)/(cot^(2)30o)+(1)/(sin^(2)60o)-cos^(2)45o (ii) 4(sin^(4)30o+cos^(2)60o)-3(cos^(2)45o-sin^(2)900)-sin^(2)600