Question

Cos 270° + 2ctg45° − 3tg0°

Answer 1

Ответ:0+2×1-3×0=2

Пошаговое объяснение:

Cos 270 =0+2Ctg45=1-3tg×0=2

Answer 2

To calculate the value of the expression cos 270° + 2ctg 45° - 3tg 0°, let's evaluate each term step by step:

1. cos 270°: The cosine of 270° is 0, as it corresponds to the x-axis in the unit circle, where the cosine is zero.

2. 2ctg 45°: The cotangent of 45° is equal to 1, so 2 times the cotangent of 45° is 2.

3. 3tg 0°: The tangent of 0° is 0, so 3 times the tangent of 0° is also 0.

Now we can substitute these values back into the original expression:

cos 270° + 2ctg 45° - 3tg 0° = 0 + 2 - 0 = 2

Therefore, the value of the expression cos 270° + 2ctg 45° - 3tg 0° is 2.