Question

if sin theta=1/3 then cos theta=​

Answer 1

Answer:

sinθ=opphyp, in this case 13.

Given these values, we can work out the adj side of our imaginary triangle to work out cosθ which equals adjhyp.

adj=√hyp2−opp2−√32−12=√8

cosθ=adjhyp=√83.

Another way we can work this out is using the trigonometric identity:

sin2A+cos2A≡1

cosA≡√1−sin2A

cosθ=√1−(13)2=√8/9=√8/3

MARK as BRAINLIEST please

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