Verify the Identity $\cos x + \sin x \tan x = \sec x$

question 87

Essay

Verify the identity. $\cos x + \sin x \tan x = \sec x$

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Definitions:

Face Value

The nominal or dollar value printed on a financial instrument, such as a bond or stock certificate, representing the amount to be paid at maturity or the value of a share.

Straight Bond Value

The present value of a bond's future interest payments and its redemption value at maturity, assuming it has no special features.

Black-Scholes Option Pricing Model

A mathematical model for pricing an options contract by estimating the variation over time of financial instruments.

Option to Buy

A contract that gives the holder the right, but not the obligation, to purchase a specified asset at a set price within a specific timeframe.