WEBVTT
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Let's find the sign of angers tension X So inverse
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tangent X means the angle Whose tangent is X and
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I'm gonna call that angle Fate up now let's draw
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picture. Suppose we have angle fatal here and we
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know it's tangent is X that means the opposite over
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adjacent is X. So if the opposite was X
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and the adjacent was one, that ratio would be
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X. Now, if that's the case, what's
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the length of the high pot news? If we're
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going to find the sine of the angle, we're
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going to need the high pot news as well as
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the opposite. So for now, I'm going to
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call the high pot news H. And now I'm
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going to use the Pythagorean theorem to find it.
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H squared equals one squared plus X squared. So
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H is the square root of one plus x squared
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. Okay, so now I confined the sign of
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angle fada. It would be opposite which is X
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over high pot news, which is square root of
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one plus X squared