SOLUTION: Hello! I need help solving this: I have cos=4/5, tan is smaller than 0. What is sin, cos, tan, csc, sec, cot? I found cos=4/5 and sec 5/4. Thank you

Question 978297: Hello!
I need help solving this:

I have cos=4/5, tan is smaller than 0.
What is sin, cos, tan, csc, sec, cot?
I found cos=4/5 and sec 5/4.
Thank you
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I have cos=4/5, tan is smaller than 0.
What is sin, cos, tan, csc, sec, cot?
I found cos=4/5 and sec 5/4.
--------------
cos + and tan negative --> Q4
-----
|sin| = sqrt(1 - cos^2) = 3/5
-----
sine neg in Q4 --> -3/5
-----
tan = sin/cos = -3/4
cot = 1/tan
csc = 1/sin

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