How are the sin 30° and the cos 60° related? explain using complete sentences.

         Cos 30° and sin 60° have the same points on the unit circle.
         cos 30° = 1/2. sin 60° = 1/2
         30° and 60° are complement angles ( 30° + 60° = 90° ).
         sin α = cos ( 90° - α )
          sin 30° = cos 60°

The linear equation is: y=ax+b