I'm currently doing some maths work from home, and realise that I tend to struggle when it comes to using the cosine, sine, sohcahtoa, and pythagoras rules.
Not so much using them, I can use them easily, but remembering when to use each one.

Does anyone have an easy way to remember when to use each of these rules on a triangle?

Edit: I do know how to use these rules. I'm more like asking how to remember when

Post edited at 5:17 am on May 12, 2008 by Wakeupcall

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Meggles13 is my wifie! :love:

In this right triangle: sin A = a/c; cos A = b/c; tan A = a/b

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In this right triangle: sin A = a/c; cos A = b/c; tan A = a/b

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you normally use the Pythagorean theorem if it's a right triangle, and you know 2 sides.

you use socahtoa on either right or any other triangle when you know 1 side and a couple of measurements.

basically if there are no angle measurements and 2 side measurements known, then you use the theorem.

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"Let your god take you to a better place

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you normally use the Pythagorean theorem if it's a right triangle, and you know 2 sides.

you use socahtoa on either right or any other triangle when you know 1 side and a couple of measurements.

basically if there are no angle measurements and 2 side measurements known, then you use the theorem.

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Thank you! Someone finally gets what I'm asking.

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Meggles13 is my wifie! :love: