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What is the length of Segment AB to the nearest tenth of a meter?
 one year ago
 one year ago
What is the length of Segment AB to the nearest tenth of a meter?
 one year ago
 one year ago

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UnkleRhaukusBest ResponseYou've already chosen the best response.0
\[AB=AD+DB\] \[\cos(60°)=\sin(30°)=\frac{AD}{14}\] \[\sin(60°)=\cos{(30°)}=\frac{DC}{14}\]
 one year ago

Qwerty90Best ResponseYou've already chosen the best response.0
Do I then need to use the sin and cosine formula to figure the rest out?
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
i still cannot see myself how to get DB
 one year ago

Qwerty90Best ResponseYou've already chosen the best response.0
what do the first two equal?
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
actually you can work out angle DCB with a trig identity, because be know two of the sides, and then use another trig identity to find DB
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
the first two what? @Qwerty90
 one year ago

Qwerty90Best ResponseYou've already chosen the best response.0
when you gave those first few ratios.. the AD/14 and DC/14 what do those equal
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
you dont know the values of sin 30=cos60? you must remember theses if you dont remember you can use a calculator
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
\[\sin60°=\cos30°\] is a little bit tricker on a calculator, because the value given is irrational but you can square the output 0.86602540... 0.86602540...^2=0.75=3/4 so \[\sin60°=\cos30°= \sqrt{\frac{3}{4}}=\frac{\sqrt3}2\]
 one year ago
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