Check my precalculus problem solutions

[r-soy]

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

 

[tiny-tim]

Hi r-soy!

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

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