Find the direction angle ? for the given vector. Let 0° ? ? < 360° and round ? to the nearest tenth when appropriate.
A. 10°
B. 45°
C. 0°
D. 90°
Answer: C
Mathematics
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Eliminate the parameter of the pair of parametric equations.x = 
, y = 2t + 5
A. y = 2
- 5, x ? 0
B. y = 2
+ 5, x ? 0
C. y = 2x2 - 5
D. y = 2x2 + 5
Mathematics
Determine whether the equation in one variable is linear.
- 17 = 22
A. linear B. not linear
Mathematics
Determine whether the argument in the problem below is valid or invalid. If valid, name the type of reasoning and if invalid, determine the error in reasoning.
?
If 
, then 
.
Therefore, 
.
?
A. valid; indirect
B. valid; direct
C. valid; transitive
D. invalid; direct
E. invalid; indirect
Mathematics
Use half-angle identities to find the exact value of the expression.sec 
A. 
B. 
C. -
D. -
Mathematics