The operator describing a rotation about the x-axis will be Rx(θ) = Starting with Calculate and so on, until you figure out the general pattern for Snx . Then use this to evaluate the power series...

The operator describing a rotation about the x-axis will be Rx(θ) =

Starting with

Calculate

and so on, until you figure out the general pattern for Sⁿ
_x
. Then use this to evaluate the power series and find R_x(θ). Note: You may need to recall that