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Mathematics
01.06.2020 20:19
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Find [2(cos240degrees + i sin240degrees)]^4

Find [2(cos240degrees + i sin240degrees)]^4
Find [2(cos240degrees + i sin240degrees)]^4
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lilpeepxliltracy
lilpeepxliltracy
5,0(44 marks)

B

Step-by-step explanation:

[2(cos240+isin240)]^4\\=[2e^{240 i}]^4\\=2^4[e^{960i}]\\=16(cos960+isin960)\\=16[cos(360 \times 2+240)+i sin(2\times360+240)]\\=16(cos240+isin240)

rowellr3
rowellr3
4,9(97 marks)

the answer is B

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