Question

Help on these two problems please!!
1. tan^-1 (-0.09)
2. cos theta- tan theta(cos theta)=0

Answer 1

@jim_thompson5910 ?

Answer 2

the first one is a calculator exercise

Answer 3

when i plug it in i get -5.14

Answer 4

i dont know what to do with that number though

Answer 5

the second one factors as
\[\cos(\theta)(1-\tan(\theta))=0\] solve for each factor
\[\cos(\theta)=0\] and
\[1-\tan(\theta)=0\]

Answer 6

http://www.wolframalpha.com/input/?i=arctan%28-.09%29

Answer 7

don't do anything with it, that is your answer

Answer 8

thanks!