November 2018 1 38 Report
Demostrar que son validas las siguientes identidades trigonométricas
aplicando las definiciones despejando y sustituyendo
1) \frac{senA}{1+cosA} = \frac{1-cosA}{senA}
2) \frac{cosB}{1+senB} = \frac{1-senB}{cosB}
3) \frac{1}{1-senA} + \frac{1}{1+senA} = 2 sec^{2} A
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