Question 891837: please help me these problems
1) sin π/2=cos
2π
non of these
π
π /2
3π/3
2) sin π /6=cos
π/3
non of these
π/4
π/6
π/2
3) cos π/2=sin
π/4
non of these
π/2
π
3π/3
4)sin π/4=cos
non of these
π/2
π/3
π/6
π/4
thank you
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! please help me these problems
1) sin π/2=cos
2π
non of these
π
π /2
3π/3
--------------
sin(pi/2) = sin(90 deg) = 1
Find the angle whose cosine = 1 (called arccos(1), acos(1), invcos(1) )
In degs, it's 0, 180, 360, etc
In radians, it's 0, pi, 2pi, etc
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Do the others the same way.
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