5. A natural question to consider is the following: Does tan A + tan B = tan (A + B)? Try substituting 35° for A and 25° for B. a. tan 35° + tan 25° = b. tan (35° + 25°) c. What is your answer to the general question raised in this exercise, yes = ? ? = tan or no? d. Do you think tan A = tan (A - B)? Explain.

Q: Pre cal

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A: Formula:   .

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