Use law of cosines to prove the measures of angles a, b, and c in the triangle below are equal. then find the exact value of cos a and explain why that value implies ma = 60°.

the 4th choice is the correct one

step-by-step explanation:

$30.32

step-by-step explanation:

65.00*.12=2.80

65.00-2.80=57.20

57.20*1.06=60.632

60.632/2=30.316

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°

answer:   2 multiplied by x =24

step-by-step explanation: