how to find area to using sin and cos
sprightlyflutters:
area of what...? triangle?
Triangle
Plz answering
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In a triangle ABC , given two side lengths BC = a and AC =b and given also the angle between these two sides C, the area is given by:
Area = 0.5absin(C).
Using in sine and cose
cos is not necessary here
Ok, but sine is neccesary to here
Unless the correct angle isn't given, in which case you would have to find it maybe using sin/cos etc
Ok
If you give me an example of a triangle then I can tell you exactly what to do, otherwise this is the formula
Thanks to to giving more information
I will try
triangle ABC, AB=10cm, ANGLE A=55, ANGLE C = 70
In this case we must first compute length BC using the sine rule. Then also compute angle B (angles add up to 180). Now we can use the formula with the lengths AB and BC and the angle between them angle B so Area = 0.5 x AB x BC x sin(B).
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Area =0.5sinABcos if area is lb
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