Question

Sin50°-sin40°×ctg20°​

Answer 1

Ответ:=0.478722

Объяснение:

Answer 2

To simplify the expression sin(50°) - sin(40°) × ctg(20°), let's break down the calculations step by step:

1. Calculate the values of sin(50°), sin(40°), and ctg(20°):

   • sin(50°) ≈ 0.7660
   • sin(40°) ≈ 0.6428
   • ctg(20°) is the reciprocal of tan(20°), so ctg(20°) ≈ 2.7475

2. Now, substitute these values into the expression: sin(50°) - sin(40°) × ctg(20°) ≈ 0.7660 - (0.6428 × 2.7475)

3. Perform the multiplication within the parentheses: sin(50°) - sin(40°) × ctg(20°) ≈ 0.7660 - 1.7659

4. Subtract the result of the multiplication from sin(50°): sin(50°) - sin(40°) × ctg(20°) ≈ -0.9999

So, sin(50°) - sin(40°) × ctg(20°) is approximately equal to -0.9999.