What is the relationship between sine and cosine?
Jul 3, 2015
Relationship between sin and cos
There are many of them. Here are a few:
They are the projections of an variable arc x on the 2 x-axis and y-axis of the trig circle.
Trig identity: sin^2 x + cos ^2 x = 1
#sin (pi/2 - x) = cos x#