Simplify
Simplify sin6x cos2x
1/2[sin(8x)+sin(4x)]
Whats the formula for Sin A Cos B
1/2[sin(A+B)+sin(A-B)]
Cos A Cos B equals 1/2[cos(A-B)-cos(A+B)]
False (Its a positive)
Simplify cos7x+cos5x
2cos(6x)cos(x)
What does Cos A Cos B equal using the product to sum?
1/2[cos(A-B)+cos(A+B)]
Sum to Product formulas make addition into multiplication
True
Simplify sin4x-sin2x
2cos(3x)sin(x)
Whats the formula for cos A-cos B?
-2 sin(A+B/2) sin(A-B/2)
Product to Sum always end up in a single trig function
False (it ends in sum or difference of 2)