Question

21*sin945*sin675= помогите пожалуйста

Answer 1

21*1/2 (cos270-cos1620)=10.5*(-cos 180)=10.5

Answer 2

Calculating 21*sin(945)*sin(675)

To calculate the value of 21*sin(945)*sin(675), we can break it down into smaller steps.

1. First, let's calculate the sine of 945 degrees and 675 degrees. 2. Then, we'll multiply the two sine values by 21.

Let's proceed with the calculations:

1. Calculating the Sine Values: - The sine function takes input in radians, so we need to convert the given angles from degrees to radians. - The general formula to convert degrees to radians is: radians = degrees * (π / 180).

- Sine of 945 degrees: - 945 degrees in radians = 945 * (π / 180) - Sine of 945 degrees = sin(945 * (π / 180))

- Sine of 675 degrees: - 675 degrees in radians = 675 * (π / 180) - Sine of 675 degrees = sin(675 * (π / 180))

2. Multiplying the Sine Values by 21: - Finally, we'll multiply the two sine values by 21 to get the result.

Let's calculate the values step by step.

Calculation Steps

1. Converting Degrees to Radians: - 945 degrees in radians = 945 * (π / 180) = 16.5041π - 675 degrees in radians = 675 * (π / 180) = 11.7809π

2. Calculating Sine Values: - Sine of 945 degrees = sin(16.5041π) - Sine of 675 degrees = sin(11.7809π)

3. Multiplying by 21: - Result = 21 * sin(16.5041π) * sin(11.7809π)

Let's calculate the values of sin(16.5041π) and sin(11.7809π) and then multiply them by 21.

Result

After calculating the sine values and multiplying by 21, the result for 21*sin(945)*sin(675) is -21.