MEDIUM PRACTICE PROBLEMS!!
Solve using the Unit Circle provided (answers at bottom of
page):
Ex. sin π/2= 1 why? Because the
y-coordinate at π/2 is 1!
Ex. cos π/6=√3 / 2 why? Because the x-coordinate at π/6 is √3 / 2!
You try:
1) cos 3π/4= ?
2) cos 11π/6=?
3) sin 5π/6=?
4) sin 5π/3=?
Answers:
1) –√2 /2
2) √3 / 2
3)1/2
4) -√3 / 2