Prove the identity.sin 
= cos x
What will be an ideal response?
sin 
= sin x cos 
+ sin 
cos x = (sin x)(0) + (1)(cos x) = cos x.
Mathematics
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Provide an appropriate response.Find the expected value of the game matrix A = 
if player 1 and player 2 decide on strategiesP = 
and Q = 
.
A. 
B. 1
C. 
D. 
Mathematics
Provide an appropriate response.Add: 627 + 89.
A. 1517 B. 717 C. 706 D. 716
Mathematics
Solve.
- 5 = 
A. -2
B. 2
C. No solution
D. - 
Mathematics
The soap bubble I am blowing has a radius that is growing at a rate of 3 cm/s. How fast is the surface area growing when the radius is 10 cm? (The surface area of a sphere of radius r is 
.)
?
A. 
B. 
C. 
D. 
E. 
Mathematics