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## aussy123 Group Title I have a question, can someone answer me. Metal awarded. one year ago one year ago

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1. aussy123 Group Title

I have a problem and it ask for tan2theta, and theta is in the 1st quad, but when I work out the problem I get a negative result. Do that number automatically turns positive?

2. aussy123 Group Title

does*

3. aussy123 Group Title

do you know anything about tan, sin and cos?

4. completeidiot Group Title

$\tan^2 \theta$ $0^\circ<\theta<90^\circ$ whats the question?

5. completeidiot Group Title

or is it $\tan (2\theta)$?

6. aussy123 Group Title

$\tan2\Theta$

7. completeidiot Group Title

what is the original question?

8. aussy123 Group Title

Given: sin =4/5 and cos x =-5/13 ; evaluate the following expression. (Theta: Quadrant I, x : Quadrant II.) tan 2 Theta a.) 8/3 b.) 24/7 c.) -24/7

9. aussy123 Group Title

my outcome is -24/7 but theta is in the first quad and tan is positive in the first quad

10. Mertsj Group Title

If theta is greater than 45 and in the first quadrant, then 2 theta is in the second quadrant where the tangent is negative.

11. completeidiot Group Title

yes theta is in the first quadrant, but you're not finding tan(theta) you're finding tan(2*theta) and its possible for 2*theta to be in the second quadrant as mertsj just stated

12. aussy123 Group Title

So my result stays at -24/5

13. aussy123 Group Title

*-24/7 sorry

14. completeidiot Group Title

assuming you didnt make any mistakes in your calculation, then that would be the answer note- i didnt actually do the problem

15. aussy123 Group Title

okay Thank You both, now I can start my quiz with no problem. fingers crossed!