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# Trig identities

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1. Jan 2006 q8 (b) can someone show their working out for this question and explain
Find all the solutions of theta to one dp in the interval 0 <theta <360 for which
tan^2 theta =4
2. (Original post by sia_x11)
Jan 2006 q8 (b) can someone show their working out for this question and explain
Find all the solutions of theta to one dp in the interval 0 <theta <360 for which
tan^2 theta =4
easy
root both sides to get

Edit: supposed to be

then solve for values
3. (Original post by thefatone)
easy
root both sides to get

then solve for values
Well, you would get
4. Solve Tan theta for both positive and negative values
5. (Original post by Foutre en L'air)
Well, you would get
ah yes i missed that thanks for pointing it out, i'll edit it?
6. (Original post by thefatone)
ah yes i missed that thanks for pointing it out, i'll edit it?
No problem, it's a very easy mistake to make!
7. (Original post by Foutre en L'air)
No problem, it's a very easy mistake to make!
That's the kind of mistake which will kill me when i don't get an A* in maths next year :/
8. Oh my bad i get it now

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