Question

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

Answer 1

         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 )
         Answer: sin 30° = cos 60°