anonymous
  • anonymous
*WILL MEDAL IF YOU CAN ANSWER!* *TRIGONOMETRY* In ΔABC, m∠B = 90°, cosC=11/17, and AB = 26 units. Based on this information, m∠A=(33,40,50)°, m∠C=(33,40,50)°, and AC=(10,22,34) units.
Mathematics
  • Stacey Warren - Expert brainly.com
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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!
anonymous
  • anonymous
what's the question ???
anonymous
  • anonymous
The numbers in parentheses are the options.
anonymous
  • anonymous
ohhh ok gimme a sec

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anonymous
  • anonymous
Thank you. <3
anonymous
  • anonymous
oh man i gtg im sorry D:
anonymous
  • anonymous
Dang.
anonymous
  • anonymous
you should tag other ppl in this question so they can find it
anonymous
  • anonymous
good luck till !!!
anonymous
  • anonymous
@wolf1728
anonymous
  • anonymous
@misssunshinexxoxo
anonymous
  • anonymous
@zepdrix
anonymous
  • anonymous
@Vocaloid
triciaal
  • triciaal
one approach do a sketch using the "draw" and label what is given
triciaal
  • triciaal
use cosine rule c^2 = a^2 + b^2 - 2 a b Cos C
triciaal
  • triciaal
wait even easier
triciaal
  • triciaal
|dw:1435346309809:dw|
anonymous
  • anonymous
I do not entirely understand.
triciaal
  • triciaal
ok using pythagorean theorem find AB the hypotenuse is the longest side of the right triangle so if given AB = 26 then you know AC is a multiple of 17 the factor will be same as 26 divided by what you calculated
anonymous
  • anonymous
I am sorry, but I am absolutely horrible at trig, so I never understand this..
anonymous
  • anonymous
I wanna say it's 33, 50, and 22.
triciaal
  • triciaal
you can only get better if you think positive
triciaal
  • triciaal
given the cos of the angle find the angle
anonymous
  • anonymous
@TheSmartOne
triciaal
  • triciaal
this is a right angle triangle right angle at B given cos = adjacent/ hypotenuse 11/17 find inverse cos to get the angle angles in a triangle add up to 180 B = 90
anonymous
  • anonymous
So A and C have to add up to equal 90?
anonymous
  • anonymous
Or...
triciaal
  • triciaal
yes
triciaal
  • triciaal
did you find
anonymous
  • anonymous
So A should be 40 and C should be 50? Or vise versa?
triciaal
  • triciaal
Cos is given find inverse Cos to get C
triciaal
  • triciaal
now do you see C = 50?
anonymous
  • anonymous
So C is 50? and A would be 40?
triciaal
  • triciaal
yes more important do you understand?
anonymous
  • anonymous
Kind of.
anonymous
  • anonymous
But what about the unit length?
triciaal
  • triciaal
what question do you have so I can review to make it clear
anonymous
  • anonymous
I don't know where to begin.. I just don't understand Sin Tan and Cos
triciaal
  • triciaal
ok look at the diagram pythagorean theorem do you see that AB = square root of (17^2 - 11^2 )?
anonymous
  • anonymous
Yes.
triciaal
  • triciaal
calculate and round so you get 13
triciaal
  • triciaal
given that AB is 26 then there is a factor of 26/13 = 2
anonymous
  • anonymous
But what about AC?
triciaal
  • triciaal
AC given = 17 there is a factor of 2 so the length of AC is 2*17 =
anonymous
  • anonymous
34.
triciaal
  • triciaal
when there is a scale factor it applies to all lengths in the figure
triciaal
  • triciaal
|dw:1435347818110:dw|
anonymous
  • anonymous
Okay, I understand now.. kinda. Thank you!
triciaal
  • triciaal
do you have any questions?
anonymous
  • anonymous
Nope, that's all I needed. :)
triciaal
  • triciaal
ok

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