Question

prove sinh2x=2 sinhx.coshx

Answer 1

man I already proved this.

Answer 2

:D

Answer 3

@adam160596 did you forget your other post?

Answer 4

$$\sinh x=\frac12(e^x-e^{-x})\\\cosh x=\frac12(e^x+e^{-x})\\\sin2x=\frac12(e^{2x}-e^{-2x})=\frac12\left((e^x)^2-(e^{-x})^2\right)=\frac12(e^x+e^{-x})(e^{x}-e^{-x})=2\sinh x\cosh x$$

Answer 5

sorry i put in the wrong question :/

Answer 6

xD