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Krista King

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How do you sketch polar curves? This is how! HINT: This one's a rose!
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Krista King

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I'm kicking off the week the right way with some more trig identities. Today it's all about product to sum identities. Enjoy!
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Krista King

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Don't forget to consider the endpoints of the interval!
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Krista King

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Finding the value of a trig function is always going to be about getting the function in terms of sine and cosine first, instead of any of the other four functions.
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Krista King

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This is a fun little application of trig that lets you figure out how tall something is.
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Even-odd identities follow the same format for each trig function, so once you know one of them, you know them all!
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Krista King

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I've been all about trig identities lately, and here's another kind: sum to product identities, which let you turn the sum or difference of trig functions into the product of trig functions.
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These problems are all about manipulating values with trig identities, and showing that the right-hand side is equal to the left-hand side.
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This is a really common problem you'll get asked in Trigonometry class, so here are a couple examples of how to prove that a trig equation is true.
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Sum-difference identities come in really handy whenever you're trying to find the trig function of an angle greater than 360 degrees or 2pi radians.
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Not 1, not 2, but ALL SIX trig functions!
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Arpit Krishna's profile photo
Dato Datuashvili's profile photo
Mostafa Alkady's profile photo
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