SOLUTION: find the exact value without using a calculator: A- Cos(2pie/3) B- Tan5pie/4 C- CSC4pie/3

Algebra ->  Trigonometry-basics -> SOLUTION: find the exact value without using a calculator: A- Cos(2pie/3) B- Tan5pie/4 C- CSC4pie/3      Log On


   

Question 950426: find the exact value without using a calculator:
A- Cos(2pie/3)
B- Tan5pie/4
C- CSC4pie/3
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find the exact value without using a calculator:
A- Cos(2pi/3)
Reference angle:: pi/3
Quadrant:: QII
Ans: (-sqrt(3)/2)
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B- Tan(5pi/4)
Reference angle:: pi/4
Quadrant:: QIII
Ans: 1
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C- CSC(4pi/3)
Reference Angle:: pi/3
Quadrant:: QIII
Ans:: (-2/sqrt(3))
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Cheers,
Stan H.
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