Question

I f
SinA=3/4
find COSA​

Answer 1

Answer:

$\sin( \alpha ) = \frac{3}{4} \\ \frac{p}{h} = \frac{3}{4} \\ b = \sqrt{16 - 9} = \sqrt{7} \\ \cos( \alpha ) = \frac{b}{h} = \frac{ \sqrt{7} }{4}$