5y2 + y + 2y2 – 7y - 5y2 + 4x
how to simplify

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cmikell124

12.08.2021

Mathematics

Answer : Option A) acute, because $10^{2}+12^{2}15^{2}$ .

Explanation : The given triangle has three sides which are:

∠A= 10 in; ∠B=12 in and ∠C=15 in

Using the theory for angles and the using the law of Cosines:

cos A = $(12^{2} + 15^{2} - 10^{2}) / 2 X 12 X 15$

On solving we get A = 41.65°

Now, cos B = $(10^{2}+15^{2} - 12^{2} )/2 X 10 X 15$

On solving we get, B = 52.89°

So, we can find C = 180° - 41.65° - 52.89°

Then C = 85.46°

Therefore the answer is acute, because $10^{2}+12^{2}15^{2}$ .

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5y2 + y + 2y2 – 7y - 5y2 + 4x how to simplify