Solve equation for Theta. Round to three significant digits.(adsbygoogle = window.adsbygoogle || []).push({});

tan theta = -2.7; 90<theta<180

I did the following:

Theta = (Tan^-1)(-2.7)

Theta = -70 degrees

Now what reference angle can I use to get an angle lower than 180 and higher than 90?? I really dont understand how am I supposed to find reference angles... I added 180 and 70=250 but that didnt make any sense :p

I subtracted 180-70= 110 degrees.. 110 could be the answer .. If so, can anyone explain why is it the answer ?

is this correct?

Thanks much

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Inverse trignometric functions

**Physics Forums | Science Articles, Homework Help, Discussion**