DustinMHayes
Sine and Cosine Ratios?



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DustinMHayes
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dw:1351201608050:dw

aroub
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sine= opposite/hypotenuse
cosine= adjacent/hypotenuse

mark_o.
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sin B =2/5 now find angle B first theN you will get cos B

mark_o.
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angle B= sin^1(2/5)=23.578 degrees
now
cos B=BC/5 therefore
BC=5 cos B
BC=5 cos23.578
BC=4.58 ans

DustinMHayes
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So what is that to the nearest degree?

mark_o.
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B=23.6 degree

mark_o.
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that is angle B, forget BC i thought you are trying to get it too ...lol

DustinMHayes
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Yea I have a table of trigonometric ratios to get the nearest degree but I dont know how to read it.