Trigonometry Examples

Find the Cosine (-6,0)
To find the between the x-axis and the line between the points and , draw the triangle between the three points , , and .
Opposite :
Adjacent :
Find the hypotenuse using Pythagorean theorem .
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Raise to the power of .
Raising to any positive power yields .
Add and .
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
therefore .
Divide by .
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