Perform the operation shown below and leave the result in trigonometric form. 
Definitions:
Expected Return
A statistical measure of the mean or average return from an investment, considering historical or anticipated performance, often used in financial analysis.
Market Return
The total return of an investment market, comprising both capital gains and dividends or interest, over a given period.
Risk-Free Rate
The theoretical return on an investment with no risk of financial loss, typically represented by the yield on government bonds.
Beta
A measurement of a stock's volatility in relation to the overall market; a beta above 1 indicates that the stock's price is more volatile than the market, while a beta below 1 indicates less volatility.
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