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2 items are filed under this topic.
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The interior angles of a right triangle |
2006-05-20 |
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From Greg:
I am wondering if there is a way to figure out the interior angles of a right triangle if we know ONLY the side lengths, and the trick is, we CANNOT use arctangent!
Answered by Leeanne Boehm and Penny Nom. |
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A problem with arccos. |
1997-06-09 |
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From Vanessa Chan:
Prove: arc cos4/5 + arc cos (-5/13) = arc cos (-56/65)
Answered by Harley Weston. |
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