Verify That Each Equation Is an Identity $$\sin ( 4 u ) = 2 \sin ( 2 u ) \cos ( 2 u )$$

Q39: Using a sum or difference identity,

Q40: Graph the expression on each side

Q41: Use Identities to find the exact

Q42: Determine all solutions of the equation

Q43: Graph the expression on each side

Q45: Use the fundamental identities to find

Q46: Write the expression in terms of

Q47: Use a sum or difference identity

Q48: Factor the trigonometric expression and simplify.<br>-

Q49: Use identities to find the indicated