Question

Sin(5x)cos(8x)-cos(5x)sin(8x)=-0.65

Answer 1

Answer:

sin(-3x)

Step-by-step explanation:

sin(A-B)

sin(5x-8x)

sin(-3x)

= -0.65

Therefore,LHS=RHS

hope it is correct

Answer 2

Answer:

[sin (5x-8x)= -sin3x = -0.65

Step-by-step explanation:

- sin 13.28= - sin 3x ...now here x=13.28÷3=4.427 approx ] is the homogeneous mixture