Question

Cosec[ arc cos(-12/13)]

Answer 1

Step-by-step explanation:

x = arc cosine(-12/13)

=> cos(x) = -12/13 in the 2nd quadrant

=> csc(x) = 13/5 by Pythagorean triple 5-12-13

2. x = arc cosine (sqrt5)/3

=> cos(x) = sqrt(5)/3

tan(1/2 x) = sqrt[(1+cos(x))/(1-cos(x))]

now complete the answer