For the following A & B, assume that all the given angles are in the simplest form, so that if A is in QIV you may assume that 270° < A < 360°. A.) If cos A = 1/2  with A in QIV, find the following. sec A/2 B.) If sin A = 5/13 with A in QII, find the following. cos A/2

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°.
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For the following A & B, assume that all the given angles are in the simplest form, so that if A is in QIV you may assume that 270° < A < 360°.

A.) If cos A = 1/2  with A in QIV, find the following. sec A/2

B.) If sin A = 5/13 with A in QII, find the following. cos A/2

 

 

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