SOLUTION: Give the exact value of: cot(-5pie/3) Give the exact value of: sec(420) can anybody help me and show me how to solve this. my math final is tomorrow!

Algebra ->  Trigonometry-basics -> SOLUTION: Give the exact value of: cot(-5pie/3) Give the exact value of: sec(420) can anybody help me and show me how to solve this. my math final is tomorrow!       Log On


   

Question 85374: Give the exact value of:
cot(-5pie/3)

Give the exact value of:
sec(420)

can anybody help me and show me how to solve this. my math final is tomorrow!
Answer by scianci(186) About Me  (Show Source):
You can put this solution on YOUR website!
cos(5pi/3) = 1/2 (just like pi/3 or 60 degrees)
sec(420) = sec (60) = 2 [The 60 comes from 420 - 360]