SinA= CosB if A and B are:

π/4radians or 5π/4 radians

Step-by-step explanation:

draw your unit circle, and you will see that the diagonal line that creates a 45 degree angle will create a 45 45 90 triangle, whose sin and cos are equivalent

5/6

step-by-step explanation:

if i remember correctly with perpendicular stuff you just take away the negative