♦ Circular Functions
- Fundamental Identities
- Use identities to find exact values at alpha for the remaining five trigonometric functions. Do not rationalize denominators. cos alpha = -((sqrt2)/3) and alpha is in quadrant III.
- Pythagorean and Negative-Angle Identities
Verifying Trigonometric Identities Sum and Difference Identities for Cosine Sum and Difference Identities for Sine and Tangent Double-Angle Identities
- Product-to-Sum Identities
- Sum-to-Product Identities
- Find the values of six trigonometric functions of theta given that cos 2theta = -12/13 and theta terminates in quadrant II.
- Find an equivalent expression for sin^4 x in terms of function values of the sine or cosine of x, 2x or 4x raised to the first power.
- Find an equivalent expression for 4x in terms of function values of the sine or cosine of x.
- sec² on TI-83: 1/((cos(x))^2)
- Entering trigonometric functions on TI-83