Question

1)4sin3x + 3cos3x=5,2
2)3sinx -4cosx=5
pomogite plizzzzzzzzz 10 klass​

Answer 1

Ответ:

-1.

4sin3x+3cos3x=5.2

{4sin3x=2.6=>{sin3x=0.6==>{3x = (-1) ^k*arcsin0.6+pi*n

{3cos3x=2.6=>{cos3x=0.8=>{3x=+-arccos0.8+2pi*n