Is sin x cos x ever equal to 1? provide a reason for you answer.

When x = 0° :    sin x = 0, cos x = 1, therefore sin x * cos x = 0.
Also, when x = 90° :  sin x = 1, cos x = 0,  so sin x * cos x = 0.
For any value between 0° and 90° , the product of sin and cos is less than 1.
We can show it like this:
sin 2 x = 2 sin x cos x ( trigonometric formula )
sin x cos x = 1
sin 2 x / 2 = 1  / * 2 ( we will multiply both sides of an equation by 2 )
sin 2 x = 2 This is impossible because the maximum value for sin of any angle is 1.
sin x cos x is never equal to 1. 

Yes you do, so £1973.09 - £1473.50 = £499.59 so tim overpaid £499.59 .hope this ; )