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Math Help - I just need an explanation of derivative problem

  1. #1
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    I just need an explanation of derivative problem

    y ' = x(sec x tan x) + (sec x)1
    y ' = (sec x )(1 + x tan x)


    ** I just don't understand how they got the second step out of the first.

    Thanks in advance
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  2. #2
    MHF Contributor
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    Quote Originally Posted by janedoe View Post
    y ' = x(sec x tan x) + (sec x)1
    y ' = (sec x )(1 + x tan x)

    ** I just don't understand how they got the second step out of the first.
    Use the factoring you learned back in algebra:

    . . . . .x(AB) + (B)1 = B(xA + 1)

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