Prove the Identity $$\cos \left( x + \frac { \pi } { 2 } \right) + \sin \left( x + \frac { \pi } { 2 } \right) = \cos x - \sin x$$

question 107

Essay

Prove the identity. $$\cos \left( x + \frac { \pi } { 2 } \right) + \sin \left( x + \frac { \pi } { 2 } \right) = \cos x - \sin x$$

Grasp the key components and objectives of an accounting system.

Understand the significance of internal controls in business operations.

Understand key financial metrics and their calculations using spreadsheet models.

Identify and apply different mathematical functions relevant to economic models.

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Definitions:

Calorie Limits

Recommended maximum intake of calories per day to maintain or achieve a healthy weight and lifestyle.

Portion Sizes

The amount of a particular food someone chooses to eat at one time, which can impact caloric intake and nutrition.

Added Sugars

Sugars and syrups that are added to foods or beverages when they are processed or prepared, not including naturally occurring sugars.

Lactose Intolerant

The inability to fully digest lactose, a sugar found in milk and dairy products, due to a deficiency in lactase enzyme.