Find the measure of an angle if its measure is 24 more than twice that of it’s complement

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.