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why is my answer wrong? c3 trig question watch

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2. cot^2(x) +1=cosec^2(x)
use that identity from the start
3. I am still looking for where you went wrong, but i would say it is better to use identity cot^2(x)=cosec^2(x)-1 and then get a quadratic equation of cot
4. then put into double brackets after simplifying
5. just remind you the denominator=0 will never be considered
6. (Original post by Synikk)
...
In addition to above, don't set the denominator as 0. What happens when you divide by 0?
7. edit: I understand how to do it with the identity and that it's easier, i already did it that way but was exploring another way

Thanks for the responses, i realised my mistake with the numerator (i missed two values that were in range with sin 3(theta) = 1/3. But can someone please explain to me why my equating my denominator to zero is wrong?
8. (Original post by Synikk)
edit: I understand how to do it with the identity and that it's easier, i already did it that way but was exploring another way

Thanks for the responses, i realised my mistake with the numerator (i missed two values that were in range with sin 3(theta) = 1/3. But can someone please explain to me why my equating my denominator to zero is wrong?
Try dividing something by 0 and see if you get 0
9. (Original post by RDKGames)
Try dividing something by 0 and see if you get 0
ah i see im getting = 0 confused with no solution. Thanks!
10. looks like other than the dividing by zero looks right

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