Q. Express as a function of a DIFFERENT angle, 0∘≤θ<360∘.cos(74∘)cos(□∘)
Understand Co-function Identities: Understand the concept of co-function identities. Co-function identities relate the trigonometric functions of an angle to the trigonometric functions of its complement. The complement of an angleθ is (90°−θ). For cosine, the co-function identity is cos(θ)=sin(90°−θ).
Apply Co-function Identity: Apply the co-function identity to cos(74∘). Using the co-function identity, we can express cos(74∘) as sin(90∘−74∘).
Calculate Complement: Calculate the complement of 74°. The complement of 74° is 90°−74°=16°.
Write Final Expression: Write the final expression.Therefore, cos(74°) can be expressed as sin(16°).
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