9
AssignmentMultiple Choice
Trigonometric Difference Identities
Question 9 • Precalculus
Find the exact value of = and cos = for α in Quadrant III and ß in Quadrant II.
Answer
A
Negative StartFraction 15 + 4 StartRoot 39 EndRoot Over 40 EndFraction
B
StartFraction 15 minus 4 StartRoot 39 EndRoot Over 40 EndFraction
C
Negative StartFraction 15 minus 4 StartRoot 39 EndRoot Over 40 EndFraction
D
StartFraction 15 + 4 StartRoot 39 EndRoot Over 40 EndFraction