SOLUTION: If x = 30 degree, then which expression is equivalent to 1/2? a. -sin x b. sin x c. -cot x d. cot x

Question 739202: If x = 30 degree, then which expression is equivalent to 1/2?
a. -sin x
b. sin x
c. -cot x
d. cot x
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!

No need to memorize that. Just picture an equilateral triangle with side length 1.
All the angles in that triangle measure .
According to the Pythagorean theorem, --> --> -->
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