Answer:
see explanation
Step-by-step explanation:
Using De Moivre's theorem
Given
[ 4(cos15° + isin15° ) ]³, then
= 4³ [ cos(3 × 15°) + isin(3 × 15°) ]
= 64 (cos45° + isin45° )
= 64 ( +
i )
= 64 ( (1 + i) )
= 32 (1 + i)
= 32 + 32
i
A point P has coordinates (-8, -2). What are its new coordinates after reflecting point P across the x-axis?
1 answer:
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1. Distribute the negative signs. Remember the Sign Rules for Multiplication:
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Hence, the answer is: Option B.