4+{[3-2).2-5].4

1st proceder a la multiplicación ==> 4+{(6-4) -5}4

2nd Quitar los paréntesis ==> 4+{2-5}4==> 4+{-3}4

3rd multiplicación: 4+{-12}

4th = - 8

3 0

3 years ago

Solve using demoivres theorem

pashok25 [27]

It's difficult to make out, but I think the task is to expand

$(\sqrt3-i)^4$

Write the number in polar form first:

$\sqrt3-i=2e^{-i\pi/6}$

By DeMoivre's theorem, you have

$(\sqrt3-i)^4=\left(2e^{-i\pi/6}\right)^4=2^4e^{-i4\pi/6}=16e^{-i2\pi/3}$

and converting back to Cartesian form, this number is equivalent to

$16\left(\cos\dfrac{2\pi}3-i\sin\dfrac{2\pi}3\right)=16\left(-\dfrac12+-\dfrac{\sqrt3}2\right)=-8(1+i\sqrt3)$

3 0

3 years ago

A vessel sails 32 miles S 45 E. How far south has it sailed?

dem82 [27]

23 miles

hope this helps :)

3 0

4 years ago

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