Question

Sin70°*cos40°-cos70°*sin40°​

Answer 1

Объяснение:

Надеюсь, что всё правильно

Answer 2

Ответ:

Объяснение:

это формула,  =sin(70-40)=sin30=1/2

Answer 3

To evaluate the expression sin(70°) * cos(40°) - cos(70°) * sin(40°), we can use the trigonometric identities for the sine and cosine of the sum or difference of two angles. Let's break it down step by step:

sin(70°) * cos(40°) - cos(70°) * sin(40°)

Using the identity sin(A - B) = sin(A) * cos(B) - cos(A) * sin(B), we can rewrite the expression as:

sin(70° - 40°)

Now we simplify the angle:

sin(30°)

Since sin(30°) = 0.5, the expression evaluates to:

0.5