# SOLUTION: If sin &#952; = 0.42 then what does sin (180+&#952;) equal? I recently did a trigonometry test and this was one of the questions on the non-calculator section. I know how to work

Algebra ->  Algebra  -> Trigonometry-basics -> SOLUTION: If sin &#952; = 0.42 then what does sin (180+&#952;) equal? I recently did a trigonometry test and this was one of the questions on the non-calculator section. I know how to work      Log On

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 Algebra: Trigonometry Solvers Lessons Answers archive Quiz In Depth

 Question 617824: If sin θ = 0.42 then what does sin (180+θ) equal? I recently did a trigonometry test and this was one of the questions on the non-calculator section. I know how to work it out using a calculator but I'm not sure how to do it without one.Answer by lwsshak3(6505)   (Show Source): You can put this solution on YOUR website!If sin θ = 0.42 then what does sin (180+θ) equal? Use sin addition formula to solve sin(s+t)=sin s cos t+cos s sin t =sin180cosθ+cos180sinθ =0*cosθ+(-1)(.42) =-.42