Posted by shameel on Monday, February 4, 2008 at 11:46am.
how can the value of tan30 be found?

math  Sara, Monday, February 4, 2008 at 1:31pm
ou need to know first of all that tanx=sinx/cosx
You will also need to know that:
sin0=0
sin30=1/2
sin45=sqrt[2]/2
sin60=sqrt[3]/2
sin 90 =1
and
cos0=1
cos30=sqrt[3]/2
cos 45=sqrt[2]/2
cos60=1/2
cos90=0
so you can recognize that 1/sqrt[3] corresponds to tan30, since tan30=sin30/cos30
=1/2/sqrt[3]/2 = 1/sqrt[3]
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