SOLUTION: Use the reference angle to find the exact value for each of the following:
a. tan(-675degree)
b. cos 7pi/2
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-> SOLUTION: Use the reference angle to find the exact value for each of the following:
a. tan(-675degree)
b. cos 7pi/2
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Question 716680: Use the reference angle to find the exact value for each of the following:
a. tan(-675degree)
b. cos 7pi/2 Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! Use the reference angle to find the exact value for each of the following:
a. tan(-675degree)
-675º is like rotating one revolution (360º) clockwise plus another 315º terminating in quadrant I at 45º where tan>0
tan(-675degree)=tan(45º)=1
..
b. cos 7pi/2
7π/2 is like rotating 3 revolutions counter-clockwise plus π terminating at π.
cos 7π/2=cos π=-1
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