Compare to this post.
Are there any other mistakes that you would expect students to make on this problem?
Thanks to Kristen Fouss for the submission.
Compare to this post.
Are there any other mistakes that you would expect students to make on this problem?
Thanks to Kristen Fouss for the submission.
4 replies on “Same Question, Different Mistake”
1 + tan^2 = sec^2, so taking the square root of both sides, 1 + tan = sec.
then do your “cancel”
and possibly
and why not
(kids, this is NOT CORRECT)
My Friday latex workout/ Phew!
Wah!
![dfrac {tan left( xright) } {1+dfrac {1} {ccos left( xright) }}+dfrac {1+dfrac {1} {ccos left( xright) }}{tan left( xright) }](https://s0.wp.com/latex.php?latex=dfrac+%7Btan+left%28+xright%29+%7D+%7B1%2Bdfrac+%7B1%7D+%7Bccos+left%28+xright%29+%7D%7D%2Bdfrac+%7B1%2Bdfrac+%7B1%7D+%7Bccos+left%28+xright%29+%7D%7D%7Btan+left%28+xright%29+%7D+&bg=ffffff&fg=000&s=0&c=20201002)
![dfrac {sin left( xright) } {1}+dfrac {1} {sin left( xright) }](https://s0.wp.com/latex.php?latex=dfrac+%7Bsin+left%28+xright%29+%7D+%7B1%7D%2Bdfrac+%7B1%7D+%7Bsin+left%28+xright%29+%7D+&bg=ffffff&fg=000&s=0&c=20201002)
![dfrac {sin ^{2}left( xright) +1} {sin(x)}](https://s0.wp.com/latex.php?latex=dfrac+%7Bsin+%5E%7B2%7Dleft%28+xright%29+%2B1%7D+%7Bsin%28x%29%7D+&bg=ffffff&fg=000&s=0&c=20201002)
![dfrac {cos^{2}left( xright) } {sin left( xright) }=dfrac {cosleft( xright) } {tan left( xright) }](https://s0.wp.com/latex.php?latex=dfrac+%7Bcos%5E%7B2%7Dleft%28+xright%29+%7D+%7Bsin+left%28+xright%29+%7D%3Ddfrac+%7Bcosleft%28+xright%29+%7D+%7Btan+left%28+xright%29+%7D+&bg=ffffff&fg=000&s=0&c=20201002)
then do your “cancel”
and possibly
and why not
Help! What did I do wrong??