Question

sina +
un 20
sin ñt
18
+ sin 5
18
a​

Answer 1

Step-by-step explanation:

The prupose of this page is to prove the following formula: \sin 3x =4\sin x\sin(60^{\circ}-x)\sin(60^{\circ}+x). The easiest way to do that is to recourse to complex numbers and Euler's formula e^{i\theta}=\cos\theta +\sin\theta. ...

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