16) if sin x= 1/5 then csc x =?

my answer: 5

17) sec x = 5/4 and value of tan x is positive what is sin x equal?

my answer: 3/5

18) cot x = 3/4 and cos x is negative. sin x =?

my answer: -4/5

19) cos x = -1/2 the value of of x can be in the form α*pi what is the value of α?

my answer: 2/3

20) the value of tan x is . sin x is positive what is sec x?

my answer: 2

21) Evaluate:

my answer: 1

22)

My answer: 3

23) can be expressed in the form . whats y?

my answer: 4

24) can be expressed in the form whats z?

my answer: 4

25) if and the vaule of x can be written in the form . whats a?

my answer: 2/3

26) sin x = 1/4 and cos x > 0. cos x can be expressed in the form what is the value of a?

my answer: 15

27) sin x =1/4 and cos x>0. sin (2x) can be written in the form what is the value of a?

My answer: 8

28) cos x= 1/3 and sin (x/2) > 0. The value of sin (x/2) can be written as . what is a?

my answer: 3

29) evaluate:

my answer: -1