SOLUTION: assuming that cos0=2/7 for an acute angle0, find sin0

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Question 745919: assuming that cos0=2/7 for an acute angle0, find sin0
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
Given:
cos%28theta%29=2%2F7
the fastest way is to use the pythagorean identity:
sin%28theta%29=sqrt%281-cos%28theta%29%5E2%29=sqrt%281-%282%2F7%29%5E2%29

which simplifies to...

%283%2Asqrt%285%29%29%2F7