Answer:
Step-by-step explanation:
Given that angle A is in IV quadrant
So A/2 would be in II quadrant.
sin A = -1/3
cos A = 
(cos A is positive since in IV quadrant)
Using this we can find cos A/2

Answer:
b is correct
Step-by-step explanation:
Answer:
The probability of the man shorter than 1.85m is 2 in 5.
Answer:
105
Step-by-step explanation:
60/4= 15
15x7= 105