`2 sin 25^(@) cos 15^(@)=`

Evaluate : 2 sin 15 ^(@) cos 15 ^(@)

sin 15^(@) + cos 105 ^(@) = ............ A) 0 B) 2 sin 15 ^(@) C) cos 15^(@) + sin 15^(@) D) sin 15^(@) - cos 15^(@)

Evaluate |(sin 25^(@) cos 25^(@)),(-sin 65^(@) cos 65^(@))| .

Evaluate: sin 25^(@) cos 65^(@) + cos 25^(@) sin 65^(@) .

Which one of the following number (s) is/are rational? - 1) sin 15^(@) 2) cos 15^(@) 3) sin 15^(@) cos 15^(@) 4) sin15^(@) cos 75^(@)

Prove that sin 75^(@) - sin 15^(@) = cos 105^(@) + cos 15^(@)

The value of (cos 15^(@) - sin 15^(@))/(cos 15^(@) + sin 15^(@) is

(cos 15^(@) + sin 15^(@))/(cos 15^(@) - sin 15^(@)) =

What is the value of 2sin15^(@) cos 15^(@)-4sin^(3)15^(@)cos15^(@) ?

(sin 65^(@) + sin 25^(@))/( cos 65^(@) + cos 25^(@))=