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# Tutor profile: Harish N.

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Harish N.
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## Questions

### Subject:Trigonometry

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Question:

SinA=1/2, find the value of CosA?

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Harish N.

By using the identity (SinA)^2+(CosA)^2=1 1/4+(CosA)^2=1 (CosA)^2=3/4 CosA=+ sqrt(3/4) or - sqrt(3/4)

### Subject:Geometry

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Question:

What is the perimeter of a rectangle when the length= 30 cm and the width=20 cm?

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Harish N.

The perimeter is when you add all four sides together. Two of the sides are the length (30). So 30+30= 60 cm, but we aren't done yet. Two of the sides are the width (20). So 20+20=40 cm. Now we have to add the two answers we got together so 60+40= 100 cm. The perimeter is 100 cm. (You also could ass 30+30+20+20= 100 cm).

### Subject:Biology

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Question:

What are the two types of cells that make up every living organism on Earth? Name at least three differences between the two.

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Harish N.

The two types of cells that make up every living organism on Earth are eukaryotic and prokaryotic cells. Three differences: -Eukaryotic cells have a nucleus, while prokaryotic do not. -Eukaryotic cells have a mitochondria, while prokaryotic do not. -Prokaryotic cells do not make up multi-cellular organisms (such as animals and plants), only bacteria.

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