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Chen Wei P.
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Mandarin
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Question:

Chen Wei P.

Trigonometry
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Question:

What is the sine of -3 radians?

Chen Wei P.

-3 is less than 0. So, let us add 2π radians -3 + 2π = -3 + 6.283... = 3.283... radians sin(-3) = sin(3.283...) = -0.141 (to 3 decimal places)

Basic Math
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Question:

10 + (8x2) - 5 x 0 / 3 + 4 = ?

Chen Wei P.

The answer is 30. You have to do multiplication and division first before addition and subtraction. So, 5 x 0 / 3 = 0 / 3 = 0. Then, 8 x 2 = 16. Finally, 10 + 16 - 0 + 4 = 30.

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