Question

Help me please I need it

Answer 1

Answer:7.4

Explanation:

Φ=20°

AB=hypotenus

7=adjacent

CosΦ=adjacent ➗ hypotenus

Cos20=7 ➗ AB

0.9397=7 ➗ AB

Cross multiply

AB x 0.9397=7

Divide both sides by 0.9397

(AB x 0.9397)/0.9397=7/0.9397

AB=7.4

Answer 2

AB ≈ 7.08

Explanation:

Cos θ = adjacent / hypotenuse

where θ = 20° , adjacent = 7 and hypotenuse = AB

cos 20 = 7 / AB

cos 20 × AB = 7

AB = 7/Cos 20

AB = 7 / 0.989

AB = 7.077

AB ≈ 7.08