if A , B, C is Angle of a triangle...
then prove
tan A-B/2=cot(C/2+B)
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Can you please tell me which class question it is ???
Are you Bengali sir ???
yaa
ooo
u?
Me to
nice..from where??
Please don't ask here sir .
ok
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A +B +C =180
tan(A+B/2) = tan (180-C/2) = tan(90-(C/2))
which is equal to cot C/2
11 th
ooo yes
right Thank you
yaa
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