3 years ago

Help me with this question.

Mathematics

2 answers:

dusya [7]3 years ago

7 0

I think the answer is b

dimulka [17.4K]3 years ago

3 0

Answer:

E is the answer

Step-by-step explanation:

I used my head. Hope this is right.

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In triangle ABC, a = 9, c = 5, and B = 120°. Find b2.

anygoal [31]

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(D) $b^2=151$

Step-by-step explanation:

Given: In triangle ABC, a=9, c=5 and ∠B=120°.

To find: The value of $b^2$ .

solution: It is given that In triangle ABC, a=9, c=5 and ∠B=120°.

Now, using the law of cosines, we get

$b^2=a^2+c^2-2(a)(c)cosB$

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