Question 180063
IF tan C=-1, then C=135 or 315 degrees.

C cannot be 135 degrees since cos 135={{{-sqrt(2)/2}}}

So, c=315 degrees

sin c={{{-sqrt(2)/2}}}
sec c={{{sqrt(2)}}}

Power up,
HyperBrain!

Stop this mess! Click <a href="http://uselessplastic.wordpress.com">here</a>