" The value of "4(cos^(2)73^(0)+cos^(2)47^(0)+cos73^(@)*cos47^(0))=

cos^(2)75^(0)+cos^(2)15^(0)-cos75^(0)cos15^(0)=

The value of 4(cos^(2)73+cos^(2)47+cos73*cos47)

The value of cos^(2)17^(@)-sin^(2)73^(@) is:

2(cos^(2) 73^(0) +cos^(2)47^(0)) - cos 154^(0) =

The value of (cos^(2)33^(0)-cos^(2)57^(0))/(sin21^(0)-cos21^(0)) is

The values of cos^(2)73^(0)+cos^(2)47^(0)-sin^(2)43^(0)+sin^(2)107^(0) is equal to: ( b) (1)/(2)(c)(sqrt(3))/(2) (d) sin^(2)73^(@)+cos^(4)73^(@)

The value of cos(2cos^(-1)0.8) is

The value of cos^(2)17^@-sin^(2)73^@ is

The value of cos (2Cos^-1 0.8) is