# Tutor profile: Vivek R.

Inactive

Vivek R.

Tutor for 3 years

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## Questions

### Subject: Trigonometry

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Question:

what is the distance of the top of the building with a point on the ground when the building is standing perpendicular to the ground if the width of the building is 15m and the height of 8 m

Inactive

Vivek R.

Answer:

The answer is the hypotenuse of the right angle triangle which is equal to the square-root of the sum of squares of 15 and 8. So the answer is 17

### Subject: Calculus

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Question:

Differentiate y = 3 sin x - 4 cos x

Inactive

Vivek R.

Answer:

The derivative of sinx is cosx and the derivative of cosx is -sinx the answer is 3 cosx+4sinx

### Subject: Algebra

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Question:

If x <2, simplify |x - 2| - 4|-6|

Inactive

Vivek R.

Answer:

Given the expression |x - 2| - 4|-6| If x < ;2 then x - 2 < 2 and if x - 2 < 2 the |x - 2| = -(x - 2). Substitute |x - 2| by -(x - 2) and |-6| by 6 . |x - 2| - 4|-6| = -(x - 2) -4(6) = -x -22

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