fill in the blank.

in advance for : ))

_ _ pi/3 sin pi/6=1/2 (sin pi/2 - sin pi/6)

||apex||

It's definitely cosine Apex just told me so- xD

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: