SOLUTION: Perform the indicated operation, and enter your answer in standard form: 5*(cos(150°)+isin(150°))*4*(cos(30°)+isin(30°)) Thanks

Algebra ->  Trigonometry-basics -> SOLUTION: Perform the indicated operation, and enter your answer in standard form: 5*(cos(150°)+isin(150°))*4*(cos(30°)+isin(30°)) Thanks      Log On

Multiply the 5 by the 4 getting 20
Add the 150° and the 30° getting 180°



Then substitute cos(180°) = -1 and sin(180°) = 0, the above becomes



-20.

Edwin