Find the Value of Given Trigonometric Function $\cos ( - 2.5 )$

question 92

Multiple Choice

Find the value of given trigonometric function.Round your answer to four decimal places. $\cos ( - 2.5 )$

• A) \(\cos ( - 2.5 ) \approx - 0.7011\)
• B) \(\cos ( - 2.5 ) \approx 0.8011\)
• C) \(\cos ( - 2.5 ) \approx - 0.8011\)
• D) \(\cos ( - 2.5 ) \approx - 0.9011\)
• E) \(\cos ( - 2.5 ) \approx - 0.6011\)

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Definitions:

Semi-Annually Compounded

Interest calculation method where the interest is added to the principal on a half-yearly basis.

Nominal Rate

The stated interest rate of a bond or loan, not accounting for inflation or compounding effects, also known as the annual percentage rate (APR).

Compounded Monthly

An interest calculation method where interest earned is added to the principal each month, affecting subsequent interest calculations.

Effective Rate

The actual annual interest rate that accounts for compounding over a given period, providing a true reflection of the financial cost or benefit.