In △ ABC, ∠B = 90°, evaluate : cosec A cos C - sin A sec C.

For each equation, given below, find the slope and the y-intercept :

(i) 3x + 2y + 4 = 0

(ii) x - 3y - 8 = 0

(iii) x + y + 4 = 0

(iv) x = 3y + 2

(v) y = 5 - 4x

(vi) 2y + 5 = 0