Two of the solutions of cos (x/2) = - square root 2/2 are ° and °. drop down one:
45
240
270
315

drop down two:
225
315
450
630

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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