Question

Prove that: tan 3A – tan 2A – tan A = tan 3A tan 2A
tan A​
And I also changed my DP please tell me your views about it.​

Answer 1

Hey mate here is your answer:

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Answer:

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3A=2A+A ,

putting tan both sides :

tan 3A=tan(2A+A) ,

tan 3A=tan 2A+tanA/(1-tan2AtanA) ,

tan 3A(1-tan2AtanA)=tan2A+tanA ,

tan3A-tan3A×tan2A×tanA=tan2A+tanA ,

or ,

tan3A×tan2A×tanA=tan3A-tan2A-tanA.✔✔✔✔✔.

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Hope it helps you Bro your DP is nice and please do mark me as Brainliest.