+118658 Why is the cosign of 90 0
Think about the unit circle. The is the circle centred at (0,0) with radius 1.
At any point on the circumference of the unit circle the cos value is given by the x value.
At 90 degrees, the point on the circumference is (0,1) The x value is 1
TAKE A LOOK AT THIS.
https://www.mathsisfun.com/algebra/trig-interactive-unit-circle.html
