Choose the polar form of the complex number -1 + i.

sqrt2(cos45° + isin45°)

sqrt2(cos135° + isin135°)

2(cos45° + isin45°)

2(cos135° + isin135°)

Question

Choose the polar form of the complex number -1 + i.



sqrt2(cos45° + isin45°)

sqrt2(cos135° + isin135°)

2(cos45° + isin45°)

2(cos135° + isin135°)

ttop0816 · Answer

@hartnn !!

ttop0816 · Answer

is this right??
sqrt2(cos45° + isin45°)

hartnn · Answer

nopes

hartnn · Answer

sqrt 2 is correct
not the angle

hartnn · Answer

$\arctan (\dfrac{1}{-1}) = \arctan(-1) = ... ?  $

ttop0816 · Answer

-pi/4!

hartnn · Answer

yes, -45 
or 
-45 + 180

hartnn · Answer

as we need a positive angle

ttop0816 · Answer

135! its the second answer (:

hartnn · Answer

yep :)

ttop0816 · Answer

this is the last question i promise!! Given the following triangle, if c = sqrt5 and a = 2, find the measure of B to the nearest degree. https://media.glynlyon.com/g_trg_2013/1/rt_triangle_abc.gif B =?? Identify the conic whose equation is given. r=1/3+2sintheta ellipse parabola << right?? hyperbola

hartnn · Answer

is that equation correct ? does not seem to be any conic http://www.wolframalpha.com/input/?i=r%3D1%2F3%2B2sintheta

ttop0816 · Answer

r=(1)/(3+2sintheta) (:

hartnn · Answer

use cos B = a/c

hartnn · Answer

http://www.wolframalpha.com/input/?i=r%3D1%2F%283%2B2sintheta%29 its an ellipse :)

ttop0816 · Answer

oh! thank you((((: then back to the first question! i use cosB= a/c?

hartnn · Answer

yes 

cos angle = adjacent side/ hypotenuse

angle here is B

ttop0816 · Answer

cos^-1(2/√5)??

ttop0816 · Answer

cos^1(2/sqrt5)?? then it would be 27 degrees??

hartnn · Answer

26.57
yes :)

ttop0816 · Answer

thank you sosososso much for replying back to every SINGLE one of my questions & helping me throughout the whole process! Now im finished with my review & it feels like i've learned waaaay more than school! I think i could do well on my test soon (: thank you again!

hartnn · Answer

good luck for the test! :)
welcome ^_^