Need help with a trig question

Can anyone pls explain how to do this question. I tried to do it using the circle but it is not right and it would be great if u could also explain how to use the graph to solve this. I am stuck because I thinkat the end you divide all the solution by 2 then -15 right? Thanks

Isn't the range meant to be 15<=2x+15<=735

Your working looks correct so far. Just remember there will be a few results.

My teacher told me to do that right at the end so you would get your solution, divide it by 2 then minus 15. But my answers are wrong...

$\tan(2x+15)=2$ for $0<x<360$

Let $\theta = 2x+15$

Solve for $\theta$


What do you get for those stages?

Thanks so much! I got it now, so does 2x+15 or whatever inside the bracket represent theta?

Yes.

Thanks. I appreciate the help

No problem

Hi again, if you have yo solve sin^2x=1, do you factorise it or square root it? Thanks

There's actually no need to use CAST diagrams; I never did. There's a much, much quicker way.

Nor did I - never really grasped how they worked tbh

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Did you just do what I do: 180-solution for sine, 360-solution for cos etc.?

Hey. I got 4 solutions? 294.1, 204.2, 114.2 and 24.2. I may be wrong, I haven't done this since my exams lool
I believe this is CAST and there is a waaay easier method, my teacher always is like "any teacher who teaches cast is ****" LOL but it's called General Solutions; if you want I can teach you it.

Yes please if you could.