SOLUTION: Write in rectangular form: {{{4(cos("135°")^""+i*sin("135°")^"")*2(cos("45°")^""+i*sin("45°")^"")}}}

Algebra ->  Sequences-and-series -> SOLUTION: Write in rectangular form: {{{4(cos("135°")^""+i*sin("135°")^"")*2(cos("45°")^""+i*sin("45°")^"")}}}       Log On


   

Question 1104365: Write in rectangular form:


Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!


Multiply the coefficients (4)(2) = 8
Add the angles: 135° + 45° = 180°

8%28cos%28%22180%B0%22%29%5E%22%22%2Bi%2Asin%28%22180%B0%22%29%29

Evaluate the trig functions:

8%28%28-1%29%2Bi%2A%280%29%5E%22%22%29

-8 <-- answer

Edwin