SOLUTION: determine the exact value of each trig ratio; a) sin 2π/3 b)cos 7π/6 c)sin 5π/4 d)tan 4π/3 e)sec 7π/6

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Question 627658: determine the exact value of each trig ratio;
a) sin 2π/3
b)cos 7π/6
c)sin 5π/4
d)tan 4π/3
e)sec 7π/6
Found 2 solutions by solver91311, ewatrrr:
Answer by solver91311(24713)   (Show Source): You can put this solution on YOUR website!


Use the unit circle:



And the following trigonometric identities:



and



Note that the -coordinate of the point of intersection of the terminal ray of the angle and the unit circle is the value of , and the -coordinate of the point of intersection of the terminal ray of the angle and the unit circle is the value of .

John

My calculator said it, I believe it, that settles it
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Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

thought this (cox,sinx) presentation would help in yor studies

 

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