Question

help me fast ...


answer fast pls ​

Answer 1

Answer:

-√3/2

Step-by-step explanation:

By the formula,

sin²x + cos²x = 1

sin²x = 1-cos²x

sinx =√(1-cos²x)

sinx = √(1-(-1/2)²)

sinx = √(1-1/4)

sinx =√3/4

sinx = √3/2

since x lies in 3rd quadrant, sinx will be negative, therefore

sinx = -√3/2