Establish the Identity $$\tan ^ { 2 } x = \sec ^ { 2 } x - \sin ^ { 2 } x - \cos ^ { 2 } x$$

question 228

Essay

Establish the identity.
- $$\tan ^ { 2 } x = \sec ^ { 2 } x - \sin ^ { 2 } x - \cos ^ { 2 } x$$

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Definitions:

European Put Option

A type of put option that can only be exercised at its expiration date, not before, contrasting with American options which can be exercised at any time before expiry.

Expiration Date

The set date on which a derivative contract such as an option or futures expires or ceases to exist.

Put Option

A legally binding agreement that enables an individual to choose, though not be forced, to offload a specific volume of an underlying asset at a predetermined rate before a particular deadline.