Trigonometry
21. In right triangle ΔLMN below, sin L = . Which of the following expressions is equal to sin M ?A.
B.
C.
D.
E.
23. In isosceles right triangle ABC (not shown), AB = AC = 3. Which of the following represents the value of cos ABC ?A.
B.
C.
D.
E. 2
25. A painter leans a 10-foot ladder against a wall at an angle of 65° relative to the ground. How far away from the wall is the base of the
ladder?A. 10 tan 65°B. 10 sin 65°