Question

find the value of sin 150​

Answer 1

Answer:

To find out the value of sin 150 , we'll choose to use the formula:

sin(a-b) = sin a cos b - sin b cos a

We'll write 150 as 180-30, so sin 150 = sin (180-30)

sin (180-30) = sin 180 cos 30 - sin 30 cos 180

sin180 = 0

sin 30 = 1/2

cos 30 = sqrt3/2

cos 180 = -1

sin 180 cos 30 - sin 30 cos 180 = 0-(1/2)(-1)=1/2

sin150 = sin30 = 1/2

Step-by-step explanation:

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Answer 2

Answer:

sin150=sin(180-30) =-sin(30) =-1/2

= -1/2