Determine If the Following Is an Identity $$\cos ^ { 2 } x - \sin ^ { 2 } x = 1 - 2 \sin ^ { 2 } x$$

question 11

Multiple Choice

Determine if the following is an identity.
- $$\cos ^ { 2 } x - \sin ^ { 2 } x = 1 - 2 \sin ^ { 2 } x$$

• A) Not an identity
• B) Identity

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Definitions:

Coupon Payment

The annual interest payment made to bondholders, typically expressed as a percentage of the face value.

Interest Rate Index

A benchmark interest rate that serves as a reference point for determining interest rates on various financial instruments or loans.

Coupon Rate

The yearly interest rate that a bond yields, represented as a percentage of its nominal value.

Face Value

The nominal or dollar value printed on a bond or stock certificate, representing the amount due at maturity or the value of a share.