Use identities to write each expression as a function of ?.cos (? - ?)
A. -sin ?
B. -cos ?
C. cos ?
D. sin ?
Answer: B
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Test the equation for symmetry with respect to the given axis, line, or pole.r = 2 cos ?;
the polar axis
A. has symmetry with respect to polar axis B. may or may not have symmetry with respect to polar axis
Solve the problem.A simple exercise machine can be constructed by mounting a stiff spring securely to a wall and attaching a "T" handle to the free end of the spring. The arms can be exercised simply by pulling the "T" handle towards the torso. For a particular spring, the stretch distance is related to the work exerted by the equation x = 
, where W is the work exerted in joules and x is the stretch distance in cm. How far will you stretch the spring if you exert 623 joules of work? Round your answer to three decimal places.
A. 0.121 cm B. 0.086 cm C. 0.015 cm D. 0.129 cm
Solve the problem.A particular freight elevator can safely carry 1096 pounds. How many 
bundles of wood can be safely carried by this elevator?
A. 5 bundles B. 4 bundles C. 7 bundles D. 8 bundles
Solve the problem.A game involves choosing 8 numbers from the numbers 1 through 13. In how many ways can this be done?
A. 1295 B. 51,891,840 C. 1267 D. 1287