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Basic Trigonometric Identities. Section 15.1. Recall Basic Trig Identities. Pythagorean Identities. Strategy for Proving Identities. Separate the equation into a left-side expression and right-side expression and work with these separately.
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Basic Trigonometric Identities Section 15.1
Strategy for Proving Identities • Separate the equation into a left-side expression and right-side expression and work with these separately. • Simplify the more complicated side, looking for ways to use the basic trig identities • After simplifying one side as much as you can, try working with the other side until both sides are the same. • Worst case scenario: express both sides in terms of sine and cosine. Then, clean up your mess.
EXAMPLE: (note restrictions) • Prove
EXAMPLE: (note Restrictions) • Prove
EXAMPLE: (note Restrictions) • Prove
EXAMPLE: (Note Restrictions) • Prove:
Homework: • p. 663-665, #9-27(odd)