1. _Given on the right side of the og equation 2._Apply the definitions of the sum and difference identities for cosine

3._ simplify the expressions

11

step-by-step explanation:

32.50-7.50=25

225/25=11

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft