Use the Fundamental Identities to Find the Value of the Trigonometric

question 164

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
- $- 8 x - 5 y = 0 , x \geq 0 ; \quad$ Find $\cos \theta$

• A) \(\frac { 5 \sqrt { 89 } } { 89 }\)
• B) \(- \frac { 5 } { 8 }\)
• C) \(- \frac { 8 } { 5 }\)
• D) \(\frac { \sqrt { 89 } } { 5 }\)

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Definitions:

Self-Contradiction

A statement or proposition that inherently contradicts itself, making it logically impossible.

Biconditional

A logical statement that is true if both its components are either true or false together.

Self-Contradiction

Self-contradiction is a logical inconsistency whereby a statement contradicts itself directly or indirectly, rendering it logically impossible.

Main Component

The primary or most important part of a system.