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]

## Answer this Question

## Related Questions

- Math - Simplify: sin60/tan30
- trig - prove that :tan20 tan30 tan40 =tan10
- campridge trigonometry - prove that ; tan20 . tan30 . tan40 = tan10
- physics - Hi I did a physics lab where we hung one spring with several different...
- ALGEBRA - If the principal P = $900, the rate r = 7 1/2 %, and time t = 1 year, ...
- rf value of lycopene - Is the the rf value of lycopene and with what solvent can...
- Math - For value cos (8ð/3). b) write cos (8ð/3) in terms of an algebraic sign ...
- Calculus - I have a graph of f(x) which I cant post here, but would like some ...
- TRIGONOMETRY - hey can somebody help me , its like a hundred questions, im ...
- calculus I - find a and b so that f(x)=x^2+ax+b has a local min at (6,-5) i ...

More Related Questions