Posted by Bobby on Tuesday, June 29, 2010 at 3:59pm.
What is the angle B?
- trig - bobpursley, Tuesday, June 29, 2010 at 4:38pm
Is this a triangle?
Law of Cosines:
solve for a.
Then, law of sines:
solve for sinB, then B
- trig - Henry, Tuesday, June 29, 2010 at 5:20pm
LAW OF COSINES: CosA=(b^2+c^2-a^2)/2bc
LAW of SINES: SinB/b=SinA/a
SinB/4=Sin46/6,Multiply both sides by 4: SinB=4*Sin46/6=0.4791, B=28.66=28.7
- trig - bobpursley, Tuesday, June 29, 2010 at 5:28pm
and easy way to check this is to grab your protractor and sketch it to see if it works.
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