Establish 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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Solve the problem.Estimate the minimum number of subintervals needed to approximate the integral
with an error of magnitude less than 10-4 using the Trapezoidal Rule.
A. 224 B. 112 C. 200 D. 100
Mathematics
Find all specified roots.Square roots of 4 + 4
i
A. 
- 
i, - 
+ 
i
B. 
+ 
i, - 
- 
i
C. - 
- 
i, 
- 
i
D. 
+ 
i, - 
- 
i
Mathematics
Write the repeating decimal number as a fraction.0.06666 . . .
A. 
B. 
C. 
D. 
Mathematics
Divide.7790.30 ÷ 7.8
A. 998.75641 B. 0.01001245 C. 9987.5641 D. 0.00100125
Mathematics