Identidades de suma y diferencia

Now Playing:Es sum and difference identities – Example 1a

Simplifica las expresiones:
1. sen 24° cos 36° + cos 24° sen 36°
Prueba las siguientes expresiones:
1. $\frac{sen \, (A - B)}{sen \, B} + \frac{\cos (A - B)}{\cos B} = \frac{sen \, A}{sen \, B \cos B}$

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