cos(630) ≈ 0.8253sin(1470) ≈ 0.4339ctg(1125) = 1 / tan(1125)
Let's find tan(1125) first:tan(1125) = sin(1125) / cos(1125) ≈ 4.7536
Therefore, ctg(1125) = 1 / tan(1125) ≈ 0.2105
Now,cos(630) - sin(1470) - ctg(1125)≈ 0.8253 - 0.4339 - 0.2105≈ 0.1809.
So, the value of the expression is approximately 0.1809.
cos(630) ≈ 0.8253
sin(1470) ≈ 0.4339
ctg(1125) = 1 / tan(1125)
Let's find tan(1125) first:
tan(1125) = sin(1125) / cos(1125) ≈ 4.7536
Therefore, ctg(1125) = 1 / tan(1125) ≈ 0.2105
Now,
cos(630) - sin(1470) - ctg(1125)
≈ 0.8253 - 0.4339 - 0.2105
≈ 0.1809.
So, the value of the expression is approximately 0.1809.