What is the relationship between sine and cosine?

1 Answer
Jul 3, 2015


Relationship between sin and cos


There are many of them. Here are a few:

  1. They are the projections of an variable arc x on the 2 x-axis and y-axis of the trig circle.

  2. Trig identity: sin^2 x + cos ^2 x = 1

  3. Complementary arcs: #sin (pi/2 - x) = cos x#