Question

Sin40cos10-sin10cos40

Answer 1

0.5 Вот вроде, ну мне так калкулятор показал

Answer 2

To evaluate the expression sin(40)cos(10) - sin(10)cos(40), we can use the trigonometric identity:

sin(A - B) = sin(A)cos(B) - cos(A)sin(B)

Let's rewrite the expression using this identity:

sin(40)cos(10) - sin(10)cos(40)

= sin(40 - 10)

= sin(30)

Now, we can use another trigonometric identity:

sin(30) = 1/2

Therefore, sin(40)cos(10) - sin(10)cos(40) = 1/2.