SOLUTION: If cos(x) = a then does cos(-x) = -a ? If sin(x) = a then does sin(-x) = -a ? If tan(x) = a then does tan(-x) = -a?

Algebra ->  Trigonometry-basics -> SOLUTION: If cos(x) = a then does cos(-x) = -a ? If sin(x) = a then does sin(-x) = -a ? If tan(x) = a then does tan(-x) = -a?      Log On


   

Question 1096622: If cos(x) = a then does cos(-x) = -a ?
If sin(x) = a then does sin(-x) = -a ?
If tan(x) = a then does tan(-x) = -a?
Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
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If cos(x) = a then does cos(-x) = -a ?    - No.

If sin(x) = a then does sin(-x) = -a ?    - Yes.

If tan(x) = a then does tan(-x) = -a?     - Yes.