Use the Fundamental Identities to Simplify the Expression $\cos ( - x ) \cos x - \sin ( - x ) \sin x$

question 418

Multiple Choice

Use the fundamental identities to simplify the expression.
- $\cos ( - x ) \cos x - \sin ( - x ) \sin x$

• A) 0
• B) 1
• C) \(\cos ^ { 2 } x \sin ^ { 2 } x\)
• D) 2

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Definitions:

Effective Annual Yield

Effective Annual Yield is the return on an investment for a one-year period, taking into account the effect of compounding interest.

Semi-Annually

Semi-annually refers to an event or action occurring twice a year, often used in the context of interest payments or reporting periods.

Yield To Maturity

The total return anticipated on a bond if the bond is held until its maturity date, factoring in its current price, interest payments, and maturity value.

Zero-Coupon Bond

A bond that does not pay periodic interest payments but is issued at a discount to its face value and redeemed for its full face value at maturity.