Pre-calculus and Trigonometry (Addition and Subtraction formulas)?

[ANA]

Express in terms of sine only---> sinx + cosx This is a pre-calculus/Trig class so please no fancy explanation or integration, limits or any of the calculus talk...please just show me how to apply the ADDITION AND SUBTRACTION FORMULAS to solve. Again, EXPRESS IN TERMS OF SINE ONLY--->THIS...SINX+COSX....thanks