Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Answer: A
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How many ways are there to arrange 12 students into groups of 3? ?
A. 1,320 B. 12(11) C. ?220 D. 110 E. ?12!(3!)
Find the volume of the described solid.The base of a solid is the region between the curve y = 6cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are isosceles right triangles with one leg on the base of the solid.
A. 
?
B. 3?
C. 
?
D. 9?
A boundary stripe 2 in. wide is painted around a rectangle whose dimensions are 100 ft by 240 ft. Use differentials to approximate the number of square feet of paint in the stripe.
a. 113 ft² b. 113.81 ft² c. 113.22 ft² d. 113.89 ft² e. 113.33 ft²
Complete the sketch so that it has the indicated symmetry.Complete the sketch so that it has 60° rotational symmetry about O.
What will be an ideal response?