Find the exact value of the expression using the provided information.Find cos(A - B) given that cos A = - 
, with A in quadrant II, and 
with B in 
A. - 
B. - 
C. 
D. 
Answer: D
Mathematics
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Find the required ratio.The percent grade of a road is the ratio of the vertical rise to the horizontal change in distance, expressed as a percentage. If a highway rises 
for each 
along the horizontal, what is the percent grade to the nearest hundredth?
A. 0.16% B. 0.25% C. 6.33% D. 3.95%
Mathematics
Find an equivalent expression by factoring.2x - 6y
A. 2(1 - 3y) B. 2(x - 6y) C. -4xy D. 2(x - 3y)
Mathematics
Evaluate to four decimal places using a calculator.
3
A. 7.3891 B. 0.1353 C. 403.4288 D. 0.0025
Mathematics
Find the exact value of the expression.sin 
A. -
(
- 1)
B. - 
C. 
D. 
(
- 1)
Mathematics