Easy Trig Proofs

Prove that:

$\frac {\sin 2x}{\cos^2 x} = 2\tan x$

Note by Yan Yau Cheng
4 years, 3 months ago

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$$\dfrac{\sin 2x}{\cos^2x}=\dfrac{2\sin x\cos x}{\cos^2x}=\dfrac{2\sin x}{\cos x}=2\tan x$$

- 4 years, 3 months ago

sin2x=2sinx.cosx /cosx^2=2.sinx/cosx=2.tanx

- 4 years, 3 months ago

sin2x=2six.cosx sin2x/cosx^2=2.six/cosx=2.tanx

- 4 years, 3 months ago

One line solution :D

- 4 years ago

ANOTHER EASY QUESTION.

- 4 years, 3 months ago