Question

7 sin 750° + 6 tg 495° – cos 45° вычислить

Answer 1

2.8304102701 вроде...

Answer 2

To calculate the given expression, we need to use the trigonometric values of the specified angles.

Here are the trigonometric values of the angles involved:

• sin(750°) = sin(750° - 360°) = sin(390°) = -sin(30°) = -0.5 (Since sin(360° + θ) = sin(θ) and sin(30°) = 0.5)

• tg(495°) = tg(495° - 360°) = tg(135°) = -1 (Since tg(θ) = tg(θ - 180°) and tg(135°) = -1)

• cos(45°) = cos(45°) = 1 (Cosine of 45° is a well-known value)

Now, let's substitute these values into the expression:

7 * sin(750°) + 6 * tg(495°) - cos(45°) = 7 * (-0.5) + 6 * (-1) - 1 = -3.5 - 6 - 1 = -10.5

So, the value of the expression is -10.5.