In triangle ABC,a=12cm,b=13cm,c=60°,Find c?
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heya
.cosc=a^2+b^2-c^2/2ab
cos60°=12^2+13^2-c^2/2●12●13
1/2=144+169-c^2/312
313=2(313-c^2)
2c^2=626-313
2c^2=313
c^2=313/2
c^2=156.5
c=12.50.
hope it help.
@rajukar
.cosc=a^2+b^2-c^2/2ab
cos60°=12^2+13^2-c^2/2●12●13
1/2=144+169-c^2/312
313=2(313-c^2)
2c^2=626-313
2c^2=313
c^2=313/2
c^2=156.5
c=12.50.
hope it help.
@rajukar
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