Cos 2x Sin 2x

Help activation testing?

We know

sin (2x) = 2 sin (x) cos (x)

Yes

cos (2x) = cos 2 (x) sin 2 (x)

Then

a 2 = (2asinxcosx) 2 + a 2 (cause 2 (x) â € in Sun 2 (x)) 2

= (Salted (2x)) 2 + a 2 (cas (2x)) 2

= a 2 * sin 2 (2x) + a 2 * cos 2 (2x)

= a 2 (sin 2 (2x) + cos 2 (2x))

= a 2 (1)

= a 2

Cos 2x Sin 2x

Help with activation testing? 3
(2asinxcosx) 2 + a2 (cos2x - sin2x) 2 = a2
In other words, in parentheses, square brackets closing 2 to sin x times cos x. Also, the square is multiplied by the square bracket cos square x minus sin square x closing square bracket, square. Fits square. This is the hardest thing I've ever encountered and what I've tried has not worked. Thank you for your help.
We know
Sin (2x) = 2 sin (x) cos (x)
Yes
cos (2x) = cos 2 (x) sin 2 (x)
Then
a 2 = (2asinxcosx) 2 + a 2 (cos 2 (x) â € sin 2 (x) 2
= (Salt (2x)) 2 + a 2 (cos (2x)) 2
= a 2 * sin 2 (2x) + a 2 * cos 2 (2x)
= a 2 (sin 2 (2x) + cos 2 (2x))
= a 2 (1)
= a 2