# Pre-Cal

posted by
**Janet**
.

1) use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle.

67 degrees and 30'

Please explain!! I do not know how to start.

posted by
**Janet**
.

1) use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle.

67 degrees and 30'

Please explain!! I do not know how to start.