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Qn #831
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In a ΔABC, if $\tan ^2\frac{A}{2}+\tan ^2\frac{B}{2}+\tan ^2\frac{C}{2}=k$ , then k is always
A.
$>1$
B.
$\geq 1$
C.
=2
D.
=1
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❓ Question: In a ΔABC, if $\tan ^2\frac{A}{2}+\tan ^2\frac{B}{... | TANCET Group Studies | Tancet Group Studies