Question

Question will be attached plz help if you can thank you :)
(i dont understand how to do the problem....)

Answer 1

17 and 18 plz

Answer 2

Well we know that csc is 1/sin, so 1/sin(-pi/4)= -Root 2 and ArcCsc(-root2)=-Pi/4, so true for 17

Answer 3

Similarly, we know that ArcSec will cancel out Sec making number 18 true as well.

Answer 4

thank you @brainshot3

Answer 5

Happy to help :)