anonymous
  • anonymous
I have a question, can someone answer me. Metal awarded.
Mathematics
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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anonymous
  • anonymous
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?
anonymous
  • anonymous
does*
anonymous
  • anonymous
do you know anything about tan, sin and cos?

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anonymous
  • anonymous
\[\tan^2 \theta\] \[0^\circ<\theta<90^\circ\] whats the question?
anonymous
  • anonymous
or is it \[\tan (2\theta)\]?
anonymous
  • anonymous
\[\tan2\Theta\]
anonymous
  • anonymous
what is the original question?
anonymous
  • anonymous
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
anonymous
  • anonymous
my outcome is -24/7 but theta is in the first quad and tan is positive in the first quad
Mertsj
  • Mertsj
If theta is greater than 45 and in the first quadrant, then 2 theta is in the second quadrant where the tangent is negative.
anonymous
  • anonymous
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
anonymous
  • anonymous
So my result stays at -24/5
anonymous
  • anonymous
*-24/7 sorry
anonymous
  • anonymous
assuming you didnt make any mistakes in your calculation, then that would be the answer note- i didnt actually do the problem
anonymous
  • anonymous
okay Thank You both, now I can start my quiz with no problem. fingers crossed!

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