Question

Find the exact value of sin(cos^-1(3/7))



is the answer 2sqrt10/7 or 7/2sqrt10

Answer 1

A

Answer 2

2sqrt(10)/7

Answer 3

\[
x^2+3^2=7^2\implies x=\sqrt{49-9}=\sqrt{40} = 2\sqrt{10} \implies x/7 = 2\sqrt{10}/7
\]

Answer 4

thanks to both!I get it now