Question

evaluate the expression .
sin 30 degrees + cos 60 degrees

Answer 1

are you supposed to use trig formulas?

Answer 2

Remember your 30 60 90 right triangle

Answer 3

i dont know

Answer 4

You can also use the unit circle

http://www.math.ucsd.edu/~jarmel/math4c/Unit_Circle_Angles.png

Answer 5

notice at the angle 30 degrees, the y coordinate is 1/2

so sin(30) = 1/2

Answer 6

http://mathworld.wolfram.com/images/eps-gif/30-60-90Triangle_1000.gif

Answer 7

\[\text{Sin}[30{}^{\circ}]+\text{Cos}[60{}^{\circ}]=\frac{1}{2}+\frac{1}{2}=1 \]