anonymous
  • anonymous
37 Questions that I need help on it was out of a few 100 but these are the 37 that I cant get the answers for. Please help solve http://s8.postimage.org/ucuh7bw51/triangle.png 1 Calculate DE. 26.016 8 9.0553... 5.7445... 2 Determine whether or not the given side lenths will form a right triangle: 6.403124237, 4, and 5. right triangle not a right triangle 3 Calculate EG. 4.125 4.898979486 8.544003745 7.416198487 4 Determine whether or not the given side lenths will form a right triangle:15, 11, and 10.19803903 right triangle not a right triangle
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
http://s7.postimage.org/yo38bp7gr/triangle2.png 5 Calculate sin θ 6/√85 7/6 7/√85 6/7 6 Calculate cos θ 6/√13 7/√85 6/√85 7/√13 7 Calculate tan θ 6/7 7/6 7/√13 7√85 http://s14.postimage.org/qnna3v8sx/triangle3.png 8 Calculate sin θ 6/5 5/6 √11/6 √11/5 9 Calculate cos θ 6/5 5/6 √11/6 √11/5 10 Calculate tan θ 6/5 5/6 √11/6 √11/5 11 If sin θ = 1/√2, find the value of θ. 60° 90° 45° 30° 12 If cos θ = 2√10/7, find the value of sin θ. √89/7 √69/7 √29/7 3/7 Circles... [url=http://postimage.org/][img]http://s9.postimage.org/qtj3uy7iz/circle1.png[/img][/url] 13 If the measure of arc BC is 63°, calculate m
anonymous
  • anonymous
For the first one: Looking at angle EDF (call the angle Z) you know from triangle EDG that: \[\cos{Z} = \frac{3}{DE}\] you also know that from triangle EDF that: \[\cos{Z} = \frac{DE}{11}\] Therefore \[\frac{3}{DE}=\frac{DE}{11}\to DE^2=33\to DE = \sqrt{33}\] since triangles don't have negative length sides. Note that \[\sqrt{33}\approx 5.7445\]
anonymous
  • anonymous
For #3 Once you have DE you can find GE using pythag. \[DE^2 = 3^2+EG^2\]

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