solve class 11 trigonometry question from image
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Is it your exam question paper ???
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friend asked me
from sample paper
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boss (funny)
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a+b+c=Π
b+a=Π-c
or, cos(a+b)= -cosc
now see the pic, I think it would be 4cosa/2cosb/2sinc/2-1
b+a=Π-c
or, cos(a+b)= -cosc
now see the pic, I think it would be 4cosa/2cosb/2sinc/2-1
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