Question

Sin 51° *cos 39°+cos 51° * sin 39

Answer 1

Ответ:

51+39=sin 90 =1

Объяснение:

Sin(x+y) =sinx*cosx+cosx*sinx

Answer 2

We can use the trigonometric identity sin(a+b) = sin(a)cos(b) + cos(a)sin(b) to simplify the expression:

sin 51° *cos 39°+cos 51° * sin 39°

= sin(51° + 39°)

= sin 90°

= 1

Therefore,

sin 51° *cos 39°+cos 51° * sin 39° = 1