SOLUTION: Please help me solve the problem below: Solve the equation and find all real solutions: cosx*sinx = 0.84

Question 1000866: Please help me solve the problem below:
Solve the equation and find all real solutions:
cosx*sinx = 0.84
Answer by ikleyn(52792) (Show Source): You can put this solution on YOUR website!
.
cos(x)*sin(x) = *sin(2x).

It is well known trigonometry formula called double argument formula for sine.

Then your equation takes a form

*sin(2x) = 0.84.

Multiply both sides by 2. You will get

sin(2x) = 1.68.

But sine can not be greater than 1. Contradiction.

Answer. The given equation has no solution.

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