Question

if SIN ∅= x/y then COS '∅' is

​

Answer 1

Answer:

cosФ =  $\frac{1}{y} \sqrt{y^{2} -x^{2} }$

Step-by-step explanation:

sinФ= x/y

$sin^{2}$ Ф+ $cos^{2}$ Ф= 1

$cos^{2}$ Ф= 1 - $sin^{2}$Ф

cosФ =

           $\sqrt{1-sin^{2}Ф}\\\\=\sqrt{1- x^{2}/y^{2} } \\\\=\sqrt{\frac{y^{2}- x^{2} }{y^{2} } } \\\\=\frac{1}{y} \sqrt{y^{2} -x^{2} }$

Pls mark the answer as Brainliest

: )