ecoli Posted February 16, 2005 Share Posted February 16, 2005 [math]\lim_{h\to\.0} \frac{tan3(x+h) - tan(3x)}{h} [/math] I know the answer is [math]3sec^2(3x) [/math]. But I'm having a very difficult time finding why, could anyone help me? What trig identities do you need? Thanks in advanced! Link to comment Share on other sites More sharing options...
ecoli Posted February 16, 2005 Author Share Posted February 16, 2005 Never mind, guys. I got it. Link to comment Share on other sites More sharing options...
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