Asked by Daniel
Find the modulus and argument of the number
Z= -sin(π/8) - i cos(π/8)
Z= -sin(π/8) - i cos(π/8)
Answers
Answered by
oobleck
sinπ/8 = cos 3π/8 and vice-versa, so you have
-cos(3π/8) - i sin(3π/8) = -1 cis(3π/8)
so modulus = -1
argument = 3π/8
-cos(3π/8) - i sin(3π/8) = -1 cis(3π/8)
so modulus = -1
argument = 3π/8
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