October 23, 2012
More Identities...
October 23, 2012
October 23, 2012
October 23, 2012
October 23, 2012
Sec. 5-5 warm-up
Verify each identity.
October 23, 2012
October 23, 2012
October 23, 2012
Rewrite each product as a sum or difference.
1. cos 3x cosx
2. Sin 7x sin 4x
Find the exact value of each expression.
3. sin 105º - cos 15º
4. 2sin (13!/12) sin (7!/12)
Solve each equation.
5. cos 2x - cos x = 0
6. cos 3x + cos 2x = 0
Challenge...
Verify
October 23, 2012
October 23, 2012
Transform to a sum or difference (positive arguments).
October 23, 2012
How can these formulas be helpful? We can now express the
sum of 2 sinusoids as a product of 2 sinusoids.
October 23, 2012