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Q14: <span class="ql-formula" data-value="r ( t ) =
Q29: An ideal projectile is launched from
Q130: <span class="ql-formula" data-value="\mathbf { r } (
Q134: u = 6i, v = 7j<br>A) 6;
Q151: A bullet is fired with a
Q160: Find the extreme values of
Q192: The distance from the point S(-6,
Q198: <span class="ql-formula" data-value="x^{2}+y^{2}=9"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msup><mi>x</mi><mn>2</mn></msup><mo>+</mo><msup><mi>y</mi><mn>2</mn></msup><mo>=</mo><mn>9</mn></mrow><annotation encoding="application/x-tex">x^{2}+y^{2}=9</annotation></semantics></math></span><span
Q211: <span class="ql-formula" data-value="x = 4 \sin t
Q249: <span class="ql-formula" data-value="f ( x , y