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    chrisw1704's Avatar
    chrisw1704 Posts: 3, Reputation: 1
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    #1

    Jan 6, 2011, 11:15 AM
    can anyone prove that:
    sec x (1 tan x/sec x)/tan x sec x = 1
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Jan 7, 2011, 09:51 AM
    Quote Originally Posted by chrisw1704 View Post
    sec x (1 tan x/sec x)/tan x sec x = 1
    No - because your equation is incomplete (it seems to be missing a couple of plus or minus signs). Please retype it. But here's a hint how to proceed: replace secx with 1/cosx, and tanx with sinx/cos.

    By the way - I'm wondering if that second secx in your equation shouldn't be cscx instead?
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