Answer:
Geometrically, these identities involve certain trigonometric functions (such as sine, cosine, tangent) of one or more angles.
...
Trigonometric Identities of Opposite Angles
Sin (-θ) = – Sin θ
Cos (-θ) = Cos θ
Tan (-θ) = – Tan θ
Cot (-θ) = – Cot θ
Sec (-θ) = Sec θ
Csc (-θ) = -Csc θ
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Answer:
Geometrically, these identities involve certain trigonometric functions (such as sine, cosine, tangent) of one or more angles.
...
Trigonometric Identities of Opposite Angles
Sin (-θ) = – Sin θ
Cos (-θ) = Cos θ
Tan (-θ) = – Tan θ
Cot (-θ) = – Cot θ
Sec (-θ) = Sec θ
Csc (-θ) = -Csc θ
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Sin (-θ) = – Sin θ
Cos (-θ) = Cos θ
Tan (-θ) = – Tan θ
Cot (-θ) = – Cot θ
Sec (-θ) = Sec θ
Csc (-θ) = -Csc θ
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