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    mathhelpplz17's Avatar
    mathhelpplz17 Posts: 1, Reputation: 1
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    #1

    Apr 16, 2013, 08:12 PM
    verifying that cot x (tan x) = 1
    The answer is the process in which one goes through to verify that this statement is true! Pre-cal help! Due tomorrow. Thank you!
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Apr 17, 2013, 05:55 AM
    You should be aware that tan(x) is defined as sin(x)/cos(x), and that cot(x) is defined as cos(x)/sin(x). Given these definitions, can you take it from here? Note that since dividing by 0 leads to an undefined result neither sin(x) nor cos(x) can equal 0, which means the identity fails at values of x = 0, pi/2, pi, etc.

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