How do you prove #cosx(tanx+secx)=sinx#?

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Answer 1 · 2015-12-24T17:04:08

I don't believe they are equal

This is what I got:

#sinx+1=sinx#

Here's the work:

#cosx(tanx+secx)=sinx#

#cosxtanx + cosxsecx = sinx#

#cosxsinx/cosx + cosx1/cosx = sinx#

#sinx + 1 = sinx#

Could be missing something though...