Question

Sin137cos47-sin47cos137

Answer 1

sin137cos47-sin47cos137=sin(137-47)=sin90=1

использовали формулы сложения

Answer 2

To simplify the expression sin(137)cos(47) - sin(47)cos(137), you can use the trigonometric identity for the difference of sines:

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

In this case, A = 137 degrees and B = 47 degrees. Plugging these values into the identity:

sin(137 - 47) = sin(90) = 1.

So, the simplified expression is: