Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, sin ? > 0Find cos 
.
A. - 
B. 
C. 
D. - 
Answer: C
Mathematics
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Solve the differential equation.y ' e4x + 4ye4x = 4x
A. y = 4x2e-4x + ce-4x B. y = 2x2e4x + ce4x C. y = 4x2e4x + ce4x D. y = 2x2e-4x + ce-4x
Mathematics
Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability.One marble is white and one marble is blue.
A. 
B. 
C. 
D. 
Mathematics
Find all real numbers that satisfy the equation. Round approximate answers to the nearest hundredth.3 tan 
- 
= 0
A. {x|x = 1.57 + 3k?}
B. {x|x = 1.57 + 3k? or x = 1.57 + 3k?}
C. 
D. {x|x = 1.57 + k?}
Mathematics
Solve the problem.If f varies jointly as q2 and h, and 
when 
and 
, find f when 
and 
.
A. 18 B. 48 C. 288 D. 72
Mathematics