WebThe soil type in the cold region of Northeast China is a very rare cold black soil with a very slow formation rate, which is a very valuable resource [1,2,3].Since the beginning of the second “green revolution” in the world, the application of chemical fertilizers has surged in most countries in the world, and the crop quality and per capita output of grain have … Web9 apr. 2024 · Precalculus archive containing a full list of precalculus questions and answers from April 09 2024.
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WebHomework 1 posted – C.G. & Basic Dynamics Problem 1 – estimating C.G. height Problem 2 – Calculating “g-load” from skid pad lap times Problem 3 – Calculating total weight transfer at speed Problem 4 – Estimating slip angles (based on some key assumptions!) Bonus question (5 pts) What is the condition in problem 4 that would allow us to make such an … WebIf `tan^2 theta = 1+2 tan^2 phi`, prove that `cos 2 phi = 1 + 2 cos 2 theta`. hotels downtown indianapolis indiana
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Web10 apr. 2024 · Example 1 Find the rate of change of the area of a circle per second with respect to its radius r when r=5 cm . Solution The area A of a circle with radius r is given by A =πr2. Therefore, the rate of change of the area A with respect to its radius r is given by drd A =drd(πr2)=2πr . When r=5 cm,drdA =10π. Webtan θ ≈ θ ，約為 0.1730 弧度 (9.91°) sin θ ≈ θ ，約為 0.2441 弧度 (13.99°) cos θ ≈ 1 − θ2 2 ，約為 0.6620 弧度 (37.93°) 和角和差角 [ 编辑] 三角恒等式 中的和角公式和差角公式，當其中一個角度很小時（ β ≈ 0），可以簡化為下式： 應用 [ 编辑] 天文學 [ 编辑] 在 天文學 上，天體的 角直徑 多半只有幾個 角秒 ，其角度很小，因此可以用小角度近似 [6] 。 線性 … Web10 apr. 2024 · (secθ + tan θ) (secθ - tan θ) = 1. ⇒ 3 (secθ - tan θ) = 1. ⇒ (secθ - tan θ) = 1/3 ----(ii) On adding (i) and (ii), we get . 2secθ = 3 + 1/3 = 10/3. ⇒ secθ = 5/3 ----(iii) On putting the value of secθ in (i), we get. tanθ + 5/3 = 3 . ⇒ tanθ = 3 - 5/3 = 4/3 ----(iv) Now, we have to find the vlaue of 3 tan θ + 9 sec θ. So ... like a creepy neighbor