Which of the following formulas are NOT correct? Choose two(2) answer sinA sinB =-1/2 cos(A-B)-cos(A+B) sinA cosB=1/2 sin(A+B)+sin(A-B) cosu-cosv=-2 sin(u+v)/2) sin (u-v)/2) cosu+cosv= 2 sin(u+v)/2) sin(u-v)/2)
Which of the following formulas are NOT correct? Choose two(2) answer sinA sinB =-1/2 cos(A-B)-cos(A+B) sinA cosB=1/2 sin(A+B)+sin(A-B) cosu-cosv=-2 sin(u+v)/2) sin (u-v)/2) cosu+cosv= 2 sin(u+v)/2) sin(u-v)/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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Transcribed Image Text:Which of the following formulas are
NOT correct? Choose two(2) answers.
sinA sinB =-1/2 cos(A-B)-cos(A+B)
sinA cosB=1/2 sin(A+B)+sin(A-B)
cosu-cosv=-2 sin(u+v)/2) sin (u-v)/2)
O cosu+cosv= 2 sin(u+v)/2) sin(u-v)/2)
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