Which value of makes this equation true?9(x - 7)4/3 = 9
a) 1
b) 7
C) 8
d) 34

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2