Albert0898
  • Albert0898
Will give a medal. Please explain all steps. http://imgur.com/2COX2YD
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Vocaloid
  • Vocaloid
hint: tan(B) = sin(B)/cos(B)
Albert0898
  • Albert0898
I did that already and am not getting any of the answers provided
Albert0898
  • Albert0898
If tan B = 9/13 and sin B = 9/13, then cos B = ?

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Jhannybean
  • Jhannybean
From @Vocaloid's hint, \[\tan(\theta) = \frac{\sin(\theta)}{\cos(\theta)} \qquad \implies \qquad \cos(\theta) = \frac{\sin(\theta)}{\cos(\theta)} \]
Jhannybean
  • Jhannybean
Just plug in your values and solve, simple
Jhannybean
  • Jhannybean
whoop, made a typo
Jhannybean
  • Jhannybean
\[\cos(\theta) = \frac{\sin(\theta)}{\tan(\theta)}\]
Vocaloid
  • Vocaloid
actually I think there's a typo in the question, cos(B) = 1
Albert0898
  • Albert0898
Using that formula yields me an answers that is not provided
Albert0898
  • Albert0898
*answer
Albert0898
  • Albert0898
I've tried every formula today and I don't get any answer that resembles any option OpenStudy was my last resort lol
Vocaloid
  • Vocaloid
you're right, it seems theres a typo in the question
Nnesha
  • Nnesha
weird question i guess we should use logic here LOL \[\rm sin \rm \theta = \frac{ opposite }{ hypotenuse }~~~~ \cos \theta = \frac{ adjacent }{ hypotenuse } ~~\tan \theta = \frac{ opposite }{ adjacent }\] and we know hypotenuse is the longest side of right triangle cos = adjacent /hyp adjacent must be less than hyp|dw:1443408580125:dw|
Nnesha
  • Nnesha
|dw:1443408594693:dw|
Nnesha
  • Nnesha
so G looks good
Nnesha
  • Nnesha
and voc is right there is a typo bec in the explanation tan=9/10 not 13 http://prntscr.com/8la7cy

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