Use the Cofunction Identities to Evaluate the Expression Without Using

question 9

Multiple Choice

Use the cofunction identities to evaluate the expression without using a calculator. ​
Cos²35° + cos²50° + cos²40° + cos²55°
​

• A)-2
• B)1
• C)-1
• D)3
• E)2

---

Definitions:

Kinesthesis

The faculty for discerning the placement, load, or kinetic changes of muscles, tendons, and joints.

Basilar Membrane

A key structure in the cochlea of the ear, which plays a critical role in the process of hearing by vibrating in response to sound.

Semicircular Canals

are three fluid-filled tubes in the inner ear that help maintain balance by sensing rotational movements of the head.

Neural Messages

Electrical and chemical signals that are transmitted by neurons within the nervous system.