Question

∠A=angle, A, equals

^\circ

∘

degrees

Round your answer to the nearest hundredth.


AB=7 AC=4 Angle C=90 degrees Angle A= ?

Answer 1

55.15°

Explanation:

The hypotenuse and the side adjacent to angle A are given, so the relevant trig relation is ...

Cos = Adjacent/Hypotenuse

cos(A) = 4/7

The value of angle A can be found using the inverse cosine function:

A = arccos(4/7) ≈ 55.15°