Question

Which of the following expressions has the same value as cos30°
?(1 point)
Responses

sin30°

sine 30 degrees

sinπ6

sine pi over 6

cos60°

cosine 60 degrees

cosπ6

Answer 1

cosπ6

Reason: 30° = π/6, so cos30° = cos(π/6). (sin30° = sin(π/6) = 1/2 and cos60° = 1/2, which are not equal to cos30° = √3/2.)