Use the "half-angle" formulas to find the sine and cosine of 15 degress.

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
Question

Use the "half-angle" formulas to find the sine and cosine of 15 degress.

7.
the circle)
8. These are the "half-angle"
formulas for sine and cosine.
1- cos(0)
sin
干=
2.
1+ cos(0)
Use the half-angle formulas to find t
Transcribed Image Text:7. the circle) 8. These are the "half-angle" formulas for sine and cosine. 1- cos(0) sin 干= 2. 1+ cos(0) Use the half-angle formulas to find t
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