Determine in which quadrant the product of cos 3pi/4 + isin 3pi/4 and 4(cos pi/2 + isin pi/2) lies.

Step-by-step explanation:

if cot=3/4 and the terminal point determined by is in quadrant 3, then ... cos ((3\pi )/(4)) ... The angle of elevation to the top of a 20-story skyscraper is measured to be 2 ... If the point P(-4/5,y) lies on the unit circle and P is in the third quadrant, what does y equal if z1=5+5i and z2=8(cos(3pi/7)+isin(3pi/7)) then z1 z2=?

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

i can you with this sweetie!

step-by-step explanation: