Original post by Musicanor
secx=1/cosx
But, I’m just not really sure how I get from the first line to the second line... but the rest I can derivative easily
1-cosx+secx-cosxsecx
secx-cosx
1/cosx- cosxcosx/cosx
1-cosxcosx/cosx
1-cos^2x/ cosx
sin^2x / cosx
sinx/cosx. sinx/1
tanxsinx
But, I’m just not really sure how I get from the first line to the second line... but the rest I can derivative easily
1-cosx+secx-cosxsecx
secx-cosx
1/cosx- cosxcosx/cosx
1-cosxcosx/cosx
1-cos^2x/ cosx
sin^2x / cosx
sinx/cosx. sinx/1
tanxsinx
Look at the last term. It's . Which means it's . Hence this is 1.
This 1 cancels with the 1 at the beginning on the expression.
Hence you end up with the second line.
(edited 5 years ago)
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