How do you find out...(Trig question)?

Question

If cos of theta = -.2 is possible using a calculator? What about sin, tan, csc, sec and cot?

Does anyone know where I can find the rules for all of this online?

Answer 1

- 1 <= cos(x) <= 1.

- 1 <= sin(x) <= 1.

tan(x) and cot(x) can have any value.

sec(x) >= 1 or sec(x) <= - 1.

csc(x) >= 1 or csc(x) <= - 1.

http://www.analyzemath.com/GraphBasicTri...

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