3 years ago

Help i dont understand this

Mathematics

1 answer:

Igoryamba3 years ago

4 0

I’m not extremely good at math but I think you need to make -x-y=1 into y=mx+b form and then solve your new equation!

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Given:

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Steps:

To find value of 'a', we will use Pythagoras theorem as the triangle is a right angle triangle,

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$a = 12$

Now to find the value of 'b', i will use law of cosine,

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$12 = \sqrt{13^{2}+5^{2}-2(5)(13)(cos\beta )}\\12=\sqrt{169 + 25-130(cos\beta )}\\12=\sqrt{194-130(cos\beta )}\\144 = 194 - 130(cos\beta )\\50 = 130(cos\beta )\\cos\beta = 0.3846\\\beta = cos^{-1}(0.3846)\\\beta = 67.38$

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Happy to help :)

If u need any help feel free to ask

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