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Use law of sines or law of cosines to find the length of side AB Please show work !!

Use law of sines or law of cosines to find the length of side AB Please show work-example-1
User Pandasauce
by
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1 Answer

5 votes

Answer:


AB = 11.3

Explanation:

Given

The attached triangle

Required

Length AB

To do this, we make use of sine law which is represented as:


(a)/(\sin(a)) = (b)/(\sin(b)) = (c)/(\sin(c))

So, we have:


(15)/(\sin(70)) = (AB)/(\sin(45))

Make AB the subject


AB = (15)/(\sin(70)) * \sin(45)


AB = (15)/(0.9397) *0.7071


AB = 11.3

User Luke McCarthy
by
7.5k points

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