complex numbers - product of polar forms

**kassums17** · April 10th 2011, 01:04 PM

perform the operation and leave in trigonometric form:

(cos 5°+i sin 5°)(cos 20°+i sin 20°)

**Plato** · April 10th 2011, 01:06 PM

Originally Posted by kassums17

perform the operation and leave in trigonometric form:
(cos 5°+i sin 5°)(cos 20°+i sin 20°)

At least tell us what you do not understand about this.

**kassums17** · April 10th 2011, 01:08 PM

how do you find the cos of 5 degrees and the cos of 20 degrees?

**Plato** · April 10th 2011, 01:13 PM

Originally Posted by kassums17

how do you find the cos of 5 degrees and the cos of 20 degrees?

There is no need to bother with that.
What does $\left[ {r(\cos (\phi ) + i\sin (\phi ))} \right]\left[ {s(\cos (\theta ) + i\sin (\theta ))} \right] = ~?$

Thread: complex numbers - product of polar forms

LinkBack

Thread Tools

Display

complex numbers - product of polar forms

Similar Math Help Forum Discussions

Determine if this set of complex numbers forms a subgroup

Complex Polar Forms, Sin and Cos Angles

[SOLVED] Product of complex numbers in polar form

Complex numbers in polar

Complex Numbers polar

Search Tags