in about arithmetic

1. In right triangle ABC, if mac = 90 and sin A = ]. In right triangle ABC, mZC = 90, mZA = 55, and cos B is equal to CA = 10. What is the length of AB to the nearest integer? A. C. 1 D. f A. 6 B. 14 (C.) 17 D. 24 2. In the accompanying diagram of right triangle ABC, LC is a right angle. Which 5. A tree casts a 25-foot shadow on a sunny day, as equation is valid for AABC? shown in the diagram below. A. COSA = _ B. tanA = - sinA = = D. cos B = a 32 - 25 ft If the angle of elevation from the tip of the shadow to the top of the tree is 32", what is the height of the tree to the nearest tenth of a foot? 3. In the accompanying diagram of A CDE, m.ZD = 90%, mZC = 28, and ED = 15. Which A. 13.2 equation can be used to find CD? 15.6 C. 21.2 D. 40.0 A. sin 28 15 E CD 15 CD B. sin 28"= 28" 15 tan 28" = 15 C, CD 6. Expressed in degrees, is equivalent to D. tan 28 = CD 15 A. 240 B. 300 C. 420 D 480