SOLUTION: Solve the following equations in the interval [0, 2pi]. 1) cos(t)= (1/2) t= 2) cos(t)= -(sqrt2/2) t=

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Question 617118: Solve the following equations in the interval [0, 2pi].
1) cos(t)= (1/2)
t=
2) cos(t)= -(sqrt2/2)
t=
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi, 

Solve the following equations in the interval [0, 2pi]. 

1) cos(t)= (1/2)  t = 60° , 300°

2) cos%28t%29=+-%28sqrt%282%29%2F2%29  t = 135° , 225°

Thought You may find this Unit Circle (cosx,sinx) presentation helpful in Your studies