Question

12. tan20° + 2 tan50º =
(A) tan 70°
(b) cot 70°
(c) sin 70°
(d) tan 70°​

Answer 1

Answer:

Brainly.in

What is your question?

Secondary School Math 5 points

What is the value of

Tan20+2tan50=

Ask for details Follow Report by Ajitunpredictab 24.04.2017

Answers

Tan 70

= Tan (20 + 50)

= Tan 20 + Tan 50 / 1- Tan 20 × Tan 50

Now,

Tan 70 = Tan 20 + Tan 50 / 1- Tan 20× Tan 50

Tan 70 - Tan70.Tan20.Tan50 = Tan20 + Tan50

Tan 70 - Tan 50 = Tan 20 + Tan 50

So Tan 70 = Tan 20 + 2Tan 50