Question

Sin⁡17° ⋅ sin⁡8° + cos2⁡12° 30' - sin⁡34°30' ⋅ sin⁡25°30'

Answer 1

Ответ:

Объяснение:

Ответ будет 0,75 это точно,я сама проверяла в ОМ.

Answer 2

To calculate this expression, we'll break it down step by step:

1. Calculate sin(17°) and sin(8°): sin(17°) ≈ 0.2924 sin(8°) ≈ 0.1392

2. Calculate cos²(12°30'): First, convert 12°30' to decimal degrees: 12°30' = 12 + 30/60 = 12.5 degrees

Now, calculate cos²(12.5°): cos(12.5°) ≈ 0.9781 cos²(12.5°) ≈ 0.9566

3. Calculate sin(34°30') and sin(25°30'): First, convert 34°30' and 25°30' to decimal degrees: 34°30' = 34 + 30/60 = 34.5 degrees 25°30' = 25 + 30/60 = 25.5 degrees

Now, calculate sin(34.5°) and sin(25.5°): sin(34.5°) ≈ 0.5587 sin(25.5°) ≈ 0.4384

4. Now, plug these values into your expression: sin(17°) * sin(8°) + cos²(12.5°) - sin(34.5°) * sin(25.5°)

0.2924 * 0.1392 + 0.9566 - 0.5587 * 0.4384

Now, calculate each term separately: 0.04064608 + 0.9566 - 0.24498008

Finally, sum up these values: 0.04064608 + 0.9566 - 0.24498008 ≈ 0.75226592

So, the result of the expression is approximately 0.7523.