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So my professor gave us a study guide for the final but no there is no answer key. Could someone check my answers please?
Express cos(2 tan^-1(x/4)) and sin(2tan^-1(x/4) as an algebraic expression in x
I got:
cos(theta)=8*sqrt(x^2+64)/x^2+64
sin(theta)=x*sqrt(x^2+64)/x^2+64
Express cos(2 tan^-1(x/4)) and sin(2tan^-1(x/4) as an algebraic expression in x
I got:
cos(theta)=8*sqrt(x^2+64)/x^2+64
sin(theta)=x*sqrt(x^2+64)/x^2+64