Droopy hates identities

Azmain S. Raiyan

New member
Joined
Oct 9, 2020
Messages
7
If,
cotA+cotB+cotC=0

Then how the heck am I supposed to show that,
(ΣtanA)2=Σtan2A

(pls explain it to me like I'm a dummy)
 

Subhotosh Khan

Super Moderator
Staff member
Joined
Jun 18, 2007
Messages
22,491
If,
cotA+cotB+cotC=0

Then how the heck am I supposed to show that,
(ΣtanA)2=Σtan2A

(pls explain it to me like I'm a dummy)
Please tell us:

How do you interpret: ΣtanA

Please show us what you have tried and exactly where you are stuck.

Please follow the rules of posting in this forum, as enunciated at:

READ BEFORE POSTING

Please share your work/thoughts about this problem.
 

Jomo

Elite Member
Joined
Dec 30, 2014
Messages
8,400
No one here will explain the problem to you as we want you to learn from this experience. We want you to solve your problem with hints from us.

Now before we can help you we need to know what you are confused about. What do you think that ΣtanA means?
 
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