a.
To prove: The identity
Given information: The given identity is
Formula used: The product to sum formulas of sine and cosine function is given as follows:
Proof:
Apply the product to sum formula on the right-hand side of the given identity.
Here, right-hand side is equal to the left-hand side of the identity. So, identity is proved.
Hence, the identity
b.
To prove: The identity
Given information: The given identity is
Formula used: The product to sum formulas of sine and cosine function is given as follows:
Proof:
Apply the product to sum formula on the right-hand side of the given identity.
Here, right-hand side is equal to the left-hand side of the identity. So, identity is proved.
Hence, the identity
c.
To prove: The identity
Given information: The given identity is
Formula used: The product to sum formulas of cosine function is given as follows:
Proof:
Apply the product to sum formula on the right-hand side of the given identity.
Here, right-hand side is equal to the left-hand side of the identity. So, identity is proved.
Hence, the identity
d.
To prove: The identity
Given information: The given identity is
Formula used: The product to sum formulas of cosine function is given as follows:
Proof:
Apply the product to sum formula on the right-hand side of the given identity.
Here, right-hand side is equal to the left-hand side of the identity. So, identity is proved.
Hence, the identity
Chapter 5 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
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- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning