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Anonymous
Trigonometric Limit Help 2016-07-18 23:22:26 Post No. 158223
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Trigonometric Limit Help 2016-07-18 23:22:26 Post No. 158223
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File: [Harunatsu] Chuunibyou demo Koi ga Shitai! - 09 [BD][720p][AAC][Dual Audio].mkv_snapshot_20.46_[2016.05.28_23.59.02].jpg (97KB, 1280x720px) Image search:
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X->0
cot3x/cotx
I get stuck here:
I change the expression to (cos3x/sin3x)/(cosx/sinx)
Then I rewrite it to
(Cos3x/Sin3x) * (Sinx/Cosx).
Then I get stuck.
Can someone tell me where to go from there and why you do what you do?
>>
File: IMG_20160719_164547.jpg (2MB, 4160x3120px)
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If you can understand it...
Basically consider 3x like 2x + x and use the formula cos(x+y) = cos2(x)cos(y) - sin2(x)sin(y) and sin(x+y) = sin(x)cos(y) - cos(x)sin(y) and shit is cash
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