SOLUTION: Hello, I just started a section on trig and wanted to check with a pro to see how i'm doing. Here is my question... In the triangle ABC we have the sides: a=2.5, b=5.0, c=2.0.

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Question 306101: Hello, I just started a section on trig and wanted to check with a pro to see how i'm doing.
Here is my question...
In the triangle ABC we have the sides: a=2.5, b=5.0, c=2.0.
Thanks for help.
Found 3 solutions by richwmiller, jesserose85, Alan3354:
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website!
You said that you "wanted to check with a pro to see how i'm doing."
But you haven't done anything but ask us to do your homework.

Answer by jesserose85(1)   (Show Source):
You can put this solution on YOUR website!
cosB=a^2+c^2-b^2/2ac
Is this the right formula to use?

Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website!
You didn't say what you want to do.
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Those side lengths won't make a triangle anyway.