Trigonometry
Section 7.4
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Derivation of the identity for cosine of a sum |
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Derivation of the identity for cosine of a difference |
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Derivation of sine identities & an example to help with homework exercises 9-20 |
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Example to help with exercises 21-30 and derivation of tan(A + B) identity |
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Examples to help with homework exercises 31-36 |
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Another approach to previous problem & example to help with hw exercises 39-48 |
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Solution to homework exercise 56 |