Product-Sum Jeopardy

Simplify

100

Simplify sin6x cos2x

1/2[sin(8x)+sin(4x)]

200

Simplify cos7x+cos5x

2cos(6x)cos(x)

300

Simplify sin4x-sin2x

2cos(3x)sin(x)

Name That Formula

100

Whats the formula for Sin A Cos B

1/2[sin(A+B)+sin(A-B)]

200

What does Cos A Cos B equal using the product to sum?

1/2[cos(A-B)+cos(A+B)]

300

Whats the formula for cos A-cos B?

-2 sin(A+B/2) sin(A-B/2)

True OR False

100

Cos A Cos B equals  1/2[cos(A-B)-cos(A+B)]

False (Its a positive)

200

Sum to Product formulas make addition into multiplication

True

300

Product to Sum always end up in a single trig function

False (it ends in sum or difference of 2)