Establish the identity.sin
= 
(cos x + sin x)
What will be an ideal response?
sin 
= sin 
cos x + sin x cos 
= 
(cos x + sin x).
Mathematics
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Find the value of d2y/dx2 at the point defined by the given value of t.x = 7 sin t, y = 7 cos t, t = 
A. 
B. -2
C. 2
D. - 
Mathematics
Find the volume of the solid generated by revolving the shaded region about the given axis.About the y-axis
A. 
?
B. 
?
C. 
?
D. 18?
Mathematics
Solve.A credit company allocates 8-digit account numbers such as 1122-3421 where the digits 1 through 9 are used. How many different account numbers can there be?
A. 40,320 B. 43,046,721 C. 13,440 D. 220,345
Mathematics
Solve.In how many different ways can the letters in the word PAYMENT be arranged if the letters are taken 4 at a time?
A. 840 B. 28 C. 420 D. 210
Mathematics