3.
a. using a diagram of the unit circle centered at the origin, explain why ) = cos(x) is an even
function.
b. using a diagram of the unit circle centered at the origin, explain why sin(x − = sin(x) for all
real values x.
c. explain why tan(x + = tan(x) for all real valuesx.

The measure of angle 0 is 600 degrees

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations