exam Maths Puzzle Numerical Ability

Please help me write 3(cos 60 degrees + i sin 60 degrees) in the form of a + bi!
Thank you, Tami

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exam Other Question

Solve the equation:

sqrtx+4 = 3

I tried to keep this seperated because the square root is x + 4.

I am going to assume I need to make X equal the 3 leaving me with this:
X= -1
sqrt-1+4 = 3
Is this the right process? Hi, I'm having trouble with inverse functions. Can I have some help?

As blood moves through a vein or artery, its velocity v is greatest along the central axis and decreases as