Can you prove the trig identities given A + B + C = 180 degrees?

[Blandified]

Given:
A + B + C = 180 degrees

Prove:
TanA + TanB + TanC = TanA x TanB x TanC
First time submitting something. Thank you all.

 

[verty]

Hint: what do you know about 3 angles that sum to 180 degrees?

 

[CAF123]

You need to show some attempt.

 

[kevinj888]

Start proving from the LHS.