You are going to need to quickly
recall the three Pythagorean Identities. The first one is easy
to remember because it's just the Pythagorean Theorem.
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on the unit circle. |
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But, can you remember the other
two? If you forget, here's the quick way to get them from the
first one:
![[ sin^2( theta ) / sin^2( theta ) ] + [ cos^2( theta ) / sin^2( theta ) ] = 1 / sin^( theta )](images/29-trigonometry-07.gif)
(You can also remember that the "co"
guys go together!)
![[ sin^2( theta ) / cos^2( theta ) ] + [ cos^2( theta ) / cos^2( theta ) ] = 1 / cos^2( theta )](images/29-trigonometry-09.gif)
Let this one guide you...
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| So,
if you want the guy with a |
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, divide by |
 |
. |
|
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| So,
if you want the guy with a |
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, divide by |
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. |
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You'll still be doing a lot of
simplifying of trig expressions in Calculus, and these come up a
lot!
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and distribution and/or downloading of these lessons is strictly
prohibited. |
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