Establish each trig identity. (1) In|tan(x)| = In|sin(x)| - In|cos(x)| (2) In|sec(x) + tan(x)| + In|sec(x) - tan(x)| = 0 Also: Is In the symbol for natural log?
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it's ln ... with a lower case L, no upper case I. I think you've seen these properties of logs on this forum before, correct? for (1) ... remember ln(a) - ln(b) = ln(a/b) ? for (2) ... remember ln(a) + ln(b) = ln(ab) ?
Yes but it's not "In" it's "ln", the first character is a lowercase L not an uppercase i.
Originally Posted by magentarita Establish each trig identity. (1) In|tan(x)| = In|sin(x)| - In|cos(x)| (2) In|sec(x) + tan(x)| + In|sec(x) - tan(x)| = 0 Also: Is In the symbol for natural log? Why didn't you apply what you learned from logarithms in this forum here? 1. 2. You should know that Thus:
Last edited by Chop Suey; Aug 24th 2008 at 04:47 PM.
I thank you all, especially Chop Suey.
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