The zero(s) is/are \( 3,-9 \). (Type integers or decimals. Use a comma to separate answers as needed.) Determine the multiplicities of the zero(s). Select the correct choice below and, if necessary, fill in the answer box(es) within your choice. A. There is one zero. The multiplicity of the zero is (Simplify your answer.) B. There are three zeros. The multiplicity of the largest zero is (Simplify your answers.) C. There are two zeros. The multiplicity of the largest zero is 1 . The multiplicity of the smallest zero is 3 . (Simplify your answers.) Determine the behavior of the function at each zero. Select the correct choice below and, if necessary, fill in the answer boxes within your choice. B. The graph touches the \( x \)-axis and turns around at all zeros. C. The graph crosses the \( x \)-axis at \( x=\square \) and touches the \( x \)-axis and turns around at \( x=\square \). (Simplify your answers. Type integers of decimals. Use a comma to separate answers as needed.)

1. Using double angle formulas, show that a) \( \frac{1}{2} \csc (A) \sec (A)=\csc (2 A) \) 2. Using half - angle formulas, show that a) \( \left.-2 \sin \left(\frac{x}{2}\right) \cos \left(\frac{x}{2}\right)=\tan (x)\right] \) b) \( \sin ^{2}\left(\frac{x}{2}\right)+\cos ^{2}\left(\frac{x}{2}\right)=1 \) Write each product as a sum or difference of sines and/or cosines. a) \( 5 \sin (4 x) \sin (6 x) \) b) \( \cos \left(\frac{2 x}{3}\right) \cos \left(\frac{4 x}{3}\right) \) Write each expression as a product of sines and/or cosines. a) \( \cos (5 x)+\cos (3 x) \) b) \( \sin \left(\frac{x}{2}\right)-\sin \left(\frac{5 x}{2}\right) \) 3.

11. The landlord's lease prohibits tenants from altering the property in any way. A young woman who uses a wheelchair cannot maneuver over the doorstep into the apartment by herself. Nor can she use the bathroom facilities in her wheelchair. Which of the following is true? a. The landlord is responsible for making all apartments accessible to people with disabilities. b. The tenant is entitled to make the necessary alterations. c. The tenant cannot remedy these conditions because of the terms of the lease. d. The landlord should not have rented this apartment to the tenant.

soit \( n \) un entier naturel différent de 1 Ecrire le nombre \( n^{4}+4 \) sous forme d'une différence de deux carrés parfaits. (2) En déduire que le nombre \( n^{4}+4 \) n'est pas premier quel que soit \( n \) dans \( \mathbb{N}^{*} \)

7) \( \frac{x^{0,5} y^{0,5}-y}{y^{.5}-x^{0,5}}+x^{0,5}= \)

GEBRA REVIEW: Solve each e ) \( \frac{k}{4}-3=-4 \)