#1
reviewing some trigonometry, definitely dont remember how to do it and I'm totally drawing blanks. Could anyone tell me how to go about solving the following?

if tanx=−0.5 then tan(−x)

If sinx=0.5 then sin(−x) =

If cosx=0.3 then cos(−x)=

If tanx=−2.5 then tan(pi+x)=

any help would be greatly appreciated
Quote by happytimeharry
you're asking UG for advice on what to do with your life? Prepare to have a career as a fluffer in the porn industry...
#2
Math Thread.
Quote by Seryaph
Great.


You just single-handedly caused an entire future generation of people to be flushed down the toilet.

Good job, TS.
#5
Quote by Dirge Humani
Can't you just use a calculator and substitute in the negatives?

+1
..is a girl
Quote by RPGoof
WAT
How about just send a ship at the speed up light directly to the sun, and the gravity will pull it towards the sun, thus speeding it over the speed of light.