Solve each equation for
Where is the sin
? Remember sin is the -value. What would be at those places?
Where is the cos
? Remember cos is the -value. What would be at those places? tan
Solve for the tan
. Draw a unit circle. Where is the tan of that value? sin
Use your calculator to get one of the values. Then use symmetry to get the other
values. There are values because when you take the square root of both sides the answer would be plus or minus!