1) Mr. Charles bought dinner for his family.

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

8 0

The correct answer is A

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Express the complex number in trigonometric form.

IRINA_888 [86]

Cos 180 = -1
sin 180 = 0

So you put in the answer that when you revert it into complex again, it would be -4.

The correct answer would be 4(cos 270 + i sin 270)

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3 years ago

Please answer ASAP. What is the negative angle of rotation for the angle with positive angle

Reil [10]

Answer:

-90

Step-by-step explanation:

The full circle is 360 degrees, so is you turn one way say 10 degrees, then you would need to move 350 degrees in opposite direction.

So, in this case moving 270 one way would be equivalent to moving 360-270=90 degrees in the opposite direction

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4 years ago

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Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sampl

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Complete Question

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sample of 15 students, the professors find the mean number of headaches is 19 and the standard deviation is 1.7. Assume the population distribution of number of headaches is normal.the correct conclusion at $\alpha =0.001$ is?