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January 22, 2017
Posted by **Oscar** on Wednesday, February 6, 2013 at 9:24pm.

- Math -
**Reiny**, Thursday, February 7, 2013 at 8:17amcosØ>0 tells me Ø is in either I or IV

tanØ = 3 tells me Ø is in I or III

So Ø must be in the 1st quadrant

tanØ = 3 = 3/1 = opposite/adjacent

so construct your triangle with those sides,

easy to see that the hypotenuse is √10

so cosØ = 1/√10 ---->**secØ = √10**

and sinØ = 3/√10 --->**cscØ = √10/3**