Angle a and angle b are complementary angles of right triangle abc, cos a = 0.83, and cos b = 0.55. what is sin a + sin b?
a) 0.28
b) 1
c) 0.38
d) 1.38

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol