- 0. Functions7h 52m
- Introduction to Functions16m
- Piecewise Functions10m
- Properties of Functions9m
- Common Functions1h 8m
- Transformations5m
- Combining Functions27m
- Exponent rules32m
- Exponential Functions28m
- Logarithmic Functions24m
- Properties of Logarithms34m
- Exponential & Logarithmic Equations35m
- Introduction to Trigonometric Functions38m
- Graphs of Trigonometric Functions44m
- Trigonometric Identities47m
- Inverse Trigonometric Functions48m
- 1. Limits and Continuity2h 2m
- 2. Intro to Derivatives1h 33m
- 3. Techniques of Differentiation3h 18m
- 4. Applications of Derivatives2h 38m
- 5. Graphical Applications of Derivatives6h 2m
- 6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
- 7. Antiderivatives & Indefinite Integrals1h 26m
- 8. Definite Integrals3h 25m
1. Limits and Continuity
Finding Limits Algebraically
Problem 3e
Textbook Question
Limits and Continuity
Suppose that ƒ(t) and ƒ(t) are defined for all t and that lim t → t₀ ƒ(t) = ―7 and lim (t → t₀) g (t) = 0 . Find the limit as t → t₀ of the following functions.
e. cos (g(t))

1
Identify the given limits: \( \lim_{t \to t_0} f(t) = -7 \) and \( \lim_{t \to t_0} g(t) = 0 \).
Recognize that you need to find \( \lim_{t \to t_0} \cos(g(t)) \).
Recall the continuity property of the cosine function: if \( g(t) \to L \) as \( t \to t_0 \), then \( \cos(g(t)) \to \cos(L) \).
Apply the continuity of the cosine function: since \( \lim_{t \to t_0} g(t) = 0 \), it follows that \( \lim_{t \to t_0} \cos(g(t)) = \cos(0) \).
Conclude that the limit is \( \cos(0) \), which is a known trigonometric value.
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