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denis23 [38]
3 years ago
5

In the right triangle shown,

Mathematics
1 answer:
Bad White [126]3 years ago
4 0

Answer:

The length of AB = x=6\sqrt{3}

Step-by-step explanation:

Given

  • θ = m∠B = 60⁰
  • BC = 3\sqrt{3}

So we have to determine the length of AB which is Hypotenuse.

i.e. AB = Hypotenuse = x ?

so

Using the formula

Cos θ = Adjacent / Hypotenuse

Here:

  • Adjacent = BC = 3\sqrt{3}

so

Cos θ = Adjacent / Hypotenuse

\cos \left(60^{\circ \:}\right)=\frac{3\sqrt{3}}{x}            ∵ AB = Hypotenuse = x

\frac{1}{2}x=3\sqrt{3}          ∵ \cos \left(60^{\circ }\right)=\frac{1}{2}

x=6\sqrt{3}            

Therefore, the length of AB = x=6\sqrt{3}

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