Verifying Trigonometric Identities (Section 5-2)
Guidelines for Verifying Trigonometric Identities Work with one side of the equation at a time. It is often better to work with the more complicated side first. Look for opportunities to factor an expression, add fractions, square a binomial, or create a monomial denominator. Look for opportunities to use the fundamental identities. Note which functions are in the final expression you want. Sines and cosines pair up well, as do secants and tangents, and cosecants and cotangents. If the preceding guidelines do no help, try converting all terms to sines and cosines. Always try something. Even making an attempt that leads to a dead end proves insight.
Verify the identity. Example 1
Verify the identity. Example 2
Verify the identity. Example 3
Verify the identity. Example 4
Verify the identity. Example 5
Verify the identity. Example 6
Verify the identity. Example 7
Verify the identity. Example 8
Verify the identity. Example 8
Verify the identity. Example 9
Verify the identity. Example 10
Verify the identity. Example 11
Verify the identity. Example 12
Verify the identity. Example 13
Verify the identity. Example 14
Verify the identity. Example 15
Verify the identity. Example 16
Verify the identity. Example 17
Verify the identity. Example 18
Powers of trigonometric functions are rewritten to be useful in calculus. Verify the identity. Example 19
Powers of trigonometric functions are rewritten to be useful in calculus. Verify the identity. Example 20
Powers of trigonometric functions are rewritten to be useful in calculus. Verify the identity. Example 21
HW #41 pg 365-366 (1-10 all, 19, 20, 21-29odd, 31-49 odd, 55, 57)
Use the cofunction identities to evaluate the expression without using a calculator. Example 22
Use the cofunction identities to evaluate the expression without using a calculator. Example 23
a) Verify the identity. b) determine if the identity is true for the given value of x. Example 24
HW #42 pg 366-367 (59, 61, 63-69all, 71, 72, 77-83odd)