Question

If the sine of an acute angle is 3/5 what is the cosine of that angle?

Answer 1

what is it in fraction form?

Answer 2

\[(sinx)^2+(cosx)^2=1\]

Answer 3

so if sin of the angle is 3/5 then just put that into the identity and solve for (cosx)

Answer 4

it has to be either 4/5 2/5 root2/5 or 1/54

Answer 5

idk how

Answer 6

ok I will show you :)

Answer 7

sinx=3/5

Answer 8

\[(\frac{ 3 }{ 5 })^2+(cosx)^2=1\]

Answer 9

\[\frac{ 9 }{ 25 }+(cosx)^2=1\]

Answer 10

\[(cosx)^2=1-(\frac{ 9 }{ 25 })\]

Answer 11

\[(cosx)^2=\frac{ 16 }{ 25}\]

Answer 12

then take the square root of both sides!

Answer 13

(cosx)= ?