Question

sin a =7/11 найдите cos a, tg a, ctg a ​.

Answer 1

Объяснение:

$\sin {}^{2} \alpha + \cos {}^{2} \alpha = 1$

$( \frac{7}{11} ) {}^{2} + \cos {}^{2} \alpha = 1$

$\cos \alpha = \frac{6 \sqrt{2} }{11}$

$\tan\alpha = \frac{ \sin \alpha }{ \cos \alpha }$

$\tan \alpha = \frac{7}{11} \div \frac{6 \sqrt{2} }{11}$

$\tan \alpha = \frac{7 \sqrt{2} }{12}$

$\cot \alpha = \frac{ \cos \alpha }{ \sin \alpha }$

$\cot \alpha = \frac{6 \sqrt{2} }{11} \div \frac{7}{11}$

$\cot \alpha = \frac{6 \sqrt{2} }{7}$