tanA+tanB/CotA+CotB= tanA tanB
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Step-by-step explanation:
TAN A + TAN B/COTA+COTB
=TAN A+TAN B
_____________
1 1
____ + ____
TAN A TAN B
=TAN A +TAN B ×TAN A. TAN B/TAN A+ TAN B
=TAN A. TAN B
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