Question

How to find cos and sin only having tan.

How to find sin only having cos and tan
How to find cos only having sin and tan

Answer 1

Answer: I know that: tan(α)=1/2

.How can I get clean values for sine / cosine without the calculator?

Is there a relationship?

I know that sin(arctan(1/2))

is a way ... But I hope you get the point.