Understand the properties of trigonometric functions.{{CMD_1}} {{CMD_2}}Evaluate expressions and solve equations involving trigonometric functions and inverse trigonometric functions.{{CMD_3}} {{CMD_4}}Understand rate of change when quantities are dependent upon each other.{{CMD_5}} {{CMD_6}}Apply chain rule to relate quantities expressed with different units.{{CMD_7}} {{CMD_8}} A spherical meteorite enters the earth's atmosphere and burns up radially at a rate proportional to its surface area with constant of proportionality {{MATH_9}}. We shall show that its radius decreases at a constant rate.