Complete the Identity $\sin x ( \sin 2 x + \sin 4 x ) =$

question 94

Multiple Choice

Complete the identity.
- $\sin x ( \sin 2 x + \sin 4 x ) =$ ?

• A) \(\cos x ( \cos 2 x - \cos 4 x )\)
• B) \(\cos x ( \cos 2 x + \cos 4 x )\)
• C) \(\frac { 1 } { 2 } \cos x ( \cos 2 x - \cos 4 x )\)
• D) \(\frac { 1 } { 2 } \cos x ( \cos 2 x + \cos 4 x )\)

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Definitions:

Current Yield

A financial ratio that shows the annual dividend rate of a security divided by its current market price.

9% Bond

A bond that pays an annual interest rate of 9% to its holder.

Current Yield

The annual income (interest or dividends) divided by the current price of the security, often used to measure the return on investment for bonds.

8 ½% Bond

A bond that pays an annual interest rate of 8.5% to its holders.