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More Math Problems (Trig Functions)

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trust:

--- Quote from: rabbit on April 03, 2006, 07:14:31 pm ---The inverse is defined as that which is multiplied by the original gives 1 (#4 and #5).

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not when the inverse trig function comes first (#4)

Armin:

--- Quote from: OG Trust on April 03, 2006, 09:23:48 pm ---Yes, the former.

I'd do it w/o unit circle because I haven't memorized it yet..I was supposed to like 2 months ago.

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Here's a little pattern I found: For sin(1/2), then measurement in radians will always have 3 as a denominator. Sin[(radical2)/2] will always have a 4 in the denominator, and sin[(radical3)/2] will always have a 6 in the denominator. Cosine is the same thing, but flipped. The cos[(radical3)/2] will have the 3 in the denominator, cos[(radical2)/2] will still have the 4, etc. I had a little trick for remembering the coefficient in front of pi as well, but I forgot it. This is just a little tip to help you out, so meh.

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