Hi i have question tanx - cotx / tanx + cotx + 1 = 2sinx so... sin/cos - cos/sin / sin/cos + cos/sin then mutlple fracs and get sin^2x - cos ^2x/ sinxcosx / sin^2x + cos^2x/ sinxcosx and then what do i do?
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Is this your question? I'm going to assume that the left hand side is written correctly, but I'm going to ask you to recheck the right hand side. After this step: We get: Recall that Therefore:
Originally Posted by Chop Suey Is this your question? I'm going to assume that the left hand side is written correctly, but I'm going to ask you to recheck the right hand side. After this step: We get: Recall that Therefore: Sorry it is 2sin^2x, but i still dont understand the steps i see how you got but after that how did you end up with 2sin^2? how do you divide that :S
Originally Posted by cokeclassic how do you divide that :S I didn't. I used the Pythagorus identity Then notice that
Ok I see.... thanks... so basically sin^2 + cos^2/ sin^2 + cos^2 is the same as sin^2 + cost ^2 since it equal 1
But I think you might have made a typo and meant instead: In that case, yes, it equals since
Er yeah, ty
Last edited by cokeclassic; Nov 9th 2008 at 08:40 PM. Reason: mistake
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