Use a calculator to find the approximate value of the expression rounded to two decimal places.cos 9°
A. -1.00
B. 0.65
C. 1.00
D. -0.65
Answer: C
Mathematics
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Find the limit.
A. 1
B. 
C. ?
D. 
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Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.sin 5x + sin 7x = sin 11x
A. 
B. 0
C. 2?
D. ?
Mathematics
Expand, where i2 = -1.(7 + i)4
A. 1400 + 2696i B. 2696 + 1400i C. 2108 + 1344i D. 1344 + 2696i
Mathematics
Find the midrange for the set of data.100, 100, 92, 54, 79, 100
A. 77 B. 89.5 C. 96 D. 73
Mathematics