Question

if tanø=20/21 than find the value of cosø​

Answer 1

Answer:

$tan \alpha = \frac{20}{21} = \frac{p}{b} \\ h = \sqrt{ {20}^{2} + {21}^{2} } = \sqrt{400 + 441} \\ h = \sqrt{841} = 29$

$cos \alpha = \frac{b}{h} = \frac{21}{29} \\ ans.$