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

question 53

Multiple Choice

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

• A) Not an identity
• B) Identity

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Opportunity Cost

The value of the best alternative that is foregone by choosing a particular action or decision, important in evaluating the cost of choices.

Alternative

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The sum of all expenses incurred by a business in producing goods or services, including fixed and variable costs.

Prime Cost

Direct materials cost plus direct labor cost.