Question

prove that ..................
for 30 points ​

Answer 1

Answer:

=> cos@ = -5/13

=> @ = cos^-1(5/13) = 112 degree

=> tanΦ = 4/3

=> Φ = tan^-(4/3) = 233 degree

=> @+Φ = 112+233 = 345 4th quadrant.

Answer 2

Answer:

@+○|=112+233=345

345-4th quadrant

hope it helps