00:02
In this question, a complex number is given as in the polar form, that is, it is equal to 0 .2 times, that is, cosine 340 degrees plus iata, sine 340 degrees.
00:23
We need to write this complex number in rectangular form.
00:27
So to write it in the rectangular form, we only need to calculate these trigonometric values, that is cosine 340 degree and sine 340 degrees.
00:38
So we know we will calculate the values of cosine 340 degree.
00:42
Cosine 340 degree can be written as cosine 360 degrees minus 20 degree.
00:55
And this can be written as cosine 20 degrees.
00:58
So, cosine 20 degree is equal to, equal to actually 0 .93, 6992, 62078...