Use a double-angle formula to rewrite the expression. 10 sin x cos x

Answer 1

Greetings! Lets solve this shall we ?

So let the double angle formula be sin2x = 2sinxcosx. We must use this to rewrite this equation.

Then, since 10 is divisible by 2, we get

10sinxcosx = (2*5)sinxcosx = 5(2sinxcosx) = 5sin2x

I hope this helped!