- #1

- 263

- 0

Solve equation for Theta. Round to three significant digits.

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

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

Last edited: