Odpowiedź:
[tex]\frac{tg\alpha + ctg\alpha }{sin\alpha + cos\alpha } = \frac{tg \alpha + ctg \alpha }{cos\alpha (1 - sin\alpha /cos\alpha )} = \frac{tg\alpha + ctg\alpha }{1 - tg\alpha } = \frac{1/2 + 2}{1 - 1/2} = \frac{5}{2} * 2 = 5[/tex]
Szczegółowe wyjaśnienie:
[tex]ctg\alpha = \frac{1}{tg\alpha } \\\\tg\alpha = \frac{sin\alpha }{cos\alpha }[/tex]
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Odpowiedź:
[tex]\frac{tg\alpha + ctg\alpha }{sin\alpha + cos\alpha } = \frac{tg \alpha + ctg \alpha }{cos\alpha (1 - sin\alpha /cos\alpha )} = \frac{tg\alpha + ctg\alpha }{1 - tg\alpha } = \frac{1/2 + 2}{1 - 1/2} = \frac{5}{2} * 2 = 5[/tex]
Szczegółowe wyjaśnienie:
[tex]ctg\alpha = \frac{1}{tg\alpha } \\\\tg\alpha = \frac{sin\alpha }{cos\alpha }[/tex]