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Question

How do I find the value of sin150°.


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Solution

Calculate the value of sin150°:

First, determine the sign of sin150°.

It is clear that 150° belongs to the second quadrant.

It is known that the values of sines are positive + in the second quadrant.

It is also known that, sin(180-x)°=sinx°.

Thus, sin150°=sin180-30°=sin30°=12.

Therefore, the value of sin150° is 12.


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