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In △ABC, AB = 15 cm, BC = 10 cm, and AC = 6 cm. Find...

In △ABC, AB = 15 cm, BC = 10 cm, and AC = 6 cm. Find the measure of angle B to the nearest degree.

Math   Precalculus   
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Answer #1

Given:- AB = 15 cm, BC = 10 cm, AC = 6 cm

let AB = a = 15 cm, BC = b = 10 cm, AC = c = 6 cm

To calculate angle B:-

Using cosine formula for angle B,

That is,.

Here, a = 15, b = 10, c = 6

Using this formula,

  

  

  

So, angle B = (26.56)°

  

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