To solve this expression, we first need to evaluate each trigonometric function at the given angles:
sin(π) = 0,cos(π) = -1,ctg(3 × π) = cot(3π) = -1/tan(3π) = -1/0 (undefined),sin(π/2) = 1.
Now we can substitute these values into the expression:
0 / 4 × (-1) / 3 - (-1) / 2 × 1 / 2= 0 × (-1/3) + 1/2= 1/2.
Therefore, the final result is 1/2.
To solve this expression, we first need to evaluate each trigonometric function at the given angles:
sin(π) = 0,
cos(π) = -1,
ctg(3 × π) = cot(3π) = -1/tan(3π) = -1/0 (undefined),
sin(π/2) = 1.
Now we can substitute these values into the expression:
0 / 4 × (-1) / 3 - (-1) / 2 × 1 / 2
= 0 × (-1/3) + 1/2
= 1/2.
Therefore, the final result is 1/2.