Help with My Questions - I Want Your Assistance

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The discussion revolves around two questions related to mathematical problems, with a focus on specific calculations and conversions. The first question highlights issues with decimal places and the need for angle conversion before performing operations. The second question confirms a correct answer but points out a potential misunderstanding regarding the use of powers in complex numbers. Clarifications are sought on these mathematical points to ensure accurate problem-solving. Overall, the thread emphasizes the importance of precision in mathematical calculations.
r-soy
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Hi

here a put two Q with it soving I want check

[PLAIN]http://up.arab-x.com/Mar10/ZKR33215.jpg

http://arb-up.com/i/00020/egtlvnenn9xs.jpg

http://arb-up.com/i/00020/hd8k4515ke6v.jpg
 
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Hi r-soy! :smile:

Q3: fine so far, except:​

i] 5.8 isn't two decimal places

ii] i don't get exactly 0.64

iii] you still need to convert it into an angle before you subtract 180º :wink:

Q4: 64 (= 26) is correct, but you seem to be using the fifth power of the (cos + isin) for some reason :confused:​
 

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