Question

Can you please help me I’m confused how to turn my answer cos B = 13/43

Answer 1

Given:

`\begin{gathered} a=13\text{ cm} \\ \\ c=43\text{ cm} \end{gathered}`

Find-:

The angle of B.

Sol:

The angle of B is:

`\begin{gathered} \text{ Base =}a=13\text{ cm} \\ \\ \text{ Hypotenuse =}c=43\text{ cm} \end{gathered}`

Angle "B"

`\cos\theta=\frac{\text{ Base}}{\text{ Hypotenuse }}`
`\begin{gathered} \cos B=\frac{\text{ Base}}{\text{ Hypotenuse }} \\ \\ \cos B=(13)/(45) \end{gathered}`

So the angle "B" is:

`\begin{gathered} \cos B=(13)/(45) \\ \\ B=\cos^(-1)((13)/(45)) \\ \\ B=73.21 \\ \\ B\approx73 \end{gathered}`

The angle of "B" is 73