Write the complex number in rectangular form. 3cis52degrees ( round to 3 decimal places)
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What does mean? What I mean, is use the definition, write it out, then use your calculator to evaluate the trig. functions.
Cis = Cos * i sin
No, . So how would you expand ?
Wouldn't it be 3*cos52 + 3 * i sin52?
Yes, that's right, now just use your calculator to approximate the rectangular components. Rectangular form is: where (i.e. and are real.) Here we have:
I got 1.847+2.364i as my answer, is that right?
Yes, that's correct! Good work!
Thank you!
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