91Ó°ÊÓ

In Exercises \(13-20,\) let \(\mathbf{v}\) be the vector from initial point \(P_{1}\) to terminal point \(P_{2} .\) Write v in terms of i and \(\mathbf{j}\). $$P_{1}=(2,-5), P_{2}=(-6,6)$$

In Exercises \(13-20,\) let \(\mathbf{v}\) be the vector from initial point \(P_{1}\) to terminal point \(P_{2} .\) Write v in terms of i and \(\mathbf{j}\). $$P_{1}=(-8,6), P_{2}=(-2,3)$$

Plot each complex number. Then write the complex number in polar form. You may express the argument in degrees or radians. $$-4 i$$

Test for symmetry and then graph each polar equation. $$r=1-\sin \theta$$

Let $$\mathbf{u}=2 \mathbf{i}-\mathbf{j}, \quad \mathbf{v}=3 \mathbf{i}+\mathbf{j}, \quad \text { and } \quad \mathbf{w}=\mathbf{i}+4 \mathbf{j}.$$ Find each specified scalar. $$4(\mathbf{u} \cdot \mathbf{v})$$

Solve each triangle. Round lengths to the nearest tenth and angle measures to the nearest degree. $$A=65^{\circ}, B=65^{\circ}, c=6$$

Plot each complex number. Then write the complex number in polar form. You may express the argument in degrees or radians. $$-3 i$$

Solve each triangle. Round lengths to the nearest tenth and angle measures to the nearest degree. $$B=80^{\circ}, C=10^{\circ}, a=8$$

Test for symmetry and then graph each polar equation. $$r=1+\sin \theta$$

Let $$\mathbf{u}=2 \mathbf{i}-\mathbf{j}, \quad \mathbf{v}=3 \mathbf{i}+\mathbf{j}, \quad \text { and } \quad \mathbf{w}=\mathbf{i}+4 \mathbf{j}.$$ Find each specified scalar. $$5(\mathbf{v} \cdot \mathbf{w})$$