Find the product and simplify.
? 
A. 
B. 
C. 1
D. 
Answer: C
Mathematics
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Find the angle between u and v in radians.u = 5i + 5j + 10k, v = 5i + 10j + 6k
A. 1.12 B. 0.52 C. 1.50 D. 1.05
Mathematics
Add and write the result in lowest terms.- 
+ 
A. 
B. 
C. 
D. 
Mathematics
Find different polar coordinates (r, ?) for the same point under the given conditions.
, r > 0 and 2? < ? < 4?
A. 
B. 
C. 
D. 
Mathematics
Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 
Mathematics