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3 years ago

Help me please I need it

Mathematics

2 answers:

skelet666 [1.2K]3 years ago

7 0

Answer:7.4

Step-by-step 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

e-lub [12.9K]3 years ago

5 0

Answer:

AB ≈ 7.08

Step-by-step 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

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