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Unformatted text preview: Proving Identities
Proving
Section 3.6 Strategies for Proving Identities
Strategies
1.
2.
3. Know the fundamental identities and
Know
look for ways to apply them.
look
Write all expressions in terms sine
Write
and cosine.
and
Work with one side of the identity
Work
and continuously refer back to the
other side.
other 4.
4. 5.
6. When one side contains only one trig.
When
function, rewrite the other side in terms
of that function.
of
Use the Pythagorean identities to
Use
substitute for expressions equal to 1.
substitute
Perform algebraic operations.
Factor
Simplify complex rational expressions.
Find the LCD and combine fractions. Combine like terms.
Multiply both the numerator and
Multiply
denominator by the same expression.
denominator
Replace a binomial with a monomial. Joke Time
Joke
Why
Why did Beethoven get rid of his
chickens?
chickens? Because
Because they kept saying “Bach,
Bach, Bach”
Bach, Why
Why did the pig want to become an
actor?
actor? Because he was a big ham! ...
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This note was uploaded on 12/01/2011 for the course MATH 111 taught by Professor Stuff during the Winter '11 term at BYU.
 Winter '11
 stuff
 Calculus

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