anonymous
  • anonymous
find the exact value of the indicated trigonometric function of theta cosθ=4/7,tanθ<0 fin sin theta
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
|dw:1360331199543:dw|
ParthKohli
  • ParthKohli
anonymous
  • anonymous
you find the lengths of the triangle using pyth. theorem

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anonymous
  • anonymous
then use the principle of sin(theta)=opp/hype, and tan(theta)= sin.cos or =opp/dj
anonymous
  • anonymous
|dw:1360331698436:dw|
anonymous
  • anonymous
tan(theta)=sin(theta)/cos(theta)
anonymous
  • anonymous
cos is adj/hype
anonymous
  • anonymous
but here tan theta is not less than 0(zero)
anonymous
  • anonymous
yes exactly @huneya
anonymous
  • anonymous
sin(theta)=opp/hype
anonymous
  • anonymous
tan(theta)=opp/adj
anonymous
  • anonymous
recheck your question
anonymous
  • anonymous
yes @rizwan has a point tan(theta) is not less than zero
anonymous
  • anonymous
that condition confused me as well
anonymous
  • anonymous
or its an error by the book or ur teacher
anonymous
  • anonymous
you can use another method to solve this
anonymous
  • anonymous
\[\sin^2(\theta) = 1 - \cos^2(\theta)\]
anonymous
  • anonymous
=1-(4/7)^2

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