KEAM 2019 Math Paper

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Question : 21 of 121

Marks: +1, -0

The product of all values of (cos‌α+i‌sin‌α)3∕5 is

cos‌5‌α+i‌sin‌5‌α
cos‌3‌α+i‌sin‌3‌α
cos‌2‌α+i‌sin‌2‌α
1
None of these

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