Question

If x is a positive angle smaller than 90° and cos(x) = 1/3, then sin(x) =

Answer 1

need help

Answer 2

hi

Answer 3

sinx = sqrt(1 - cos^2x)
= sqrt(8/9) = 2sqrt2 / 3

Answer 4

ok - i used the trig identity

sin^2x + cos^x = 1

Answer 5

ok

Answer 6

thanks

Answer 7

no probs - plz click on good answer to close the question

Answer 8

yes

Answer 9

ty

Answer 10

jimmyrep great! :)

Answer 11

yes he is

Answer 12

cosx=1/3=adjacent/hypenuese
so the opposite side can be found be Pythagorean thm
1^2+(opposite)^2=3^2
1+(opposite)^2=9
(opposite)^2=9-1
(opposite)^2=8
opposite=sqrt{8}
sinx=opposite/hypenuese=sqrt{8}/3