Question

Write two formula for sin2x.
And
Write formula for cot(x-y)
Pllzzz tommorow is my maths exam

Answer 1

$$\begin{gathered} \mathrm{Dear}\mathrm{Student}, \\ \mathrm{Cot}\left(\mathrm{x}-\mathrm{y}\right)=\frac{\mathrm{cotxcoty}+1}{\mathrm{coty}-\mathrm{cotx}} \\ \sin 2\mathrm{x}=2\mathrm{sinxcosx}=\sqrt{1-{\cos }^{2}2x} \\ \mathrm{Regards} \end{gathered}$$