find the value of x.

Asked by Amee | 18th Dec, 2012, 08:39: PM

Expert Answer:

LET sin-1 x=a
therefor sin a=X
given cos a=1/9
 
therefor X^2=(sin a)^2=1-1/81=80/81
 
 
therefor x=(80/81)^(1/2)=(4root 5)/9

Answered by  | 20th Dec, 2012, 11:32: PM

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