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

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Defined lines marking the limits of a territory, within which a state exercises authority and can implement governance and control.

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Invisible lines that define the differences in values, beliefs, and practices among various cultural groups.

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