Cos 120°: ValueIn order to find the value of cos 120°, students need to draw a right-angled triangle (refer to the image below) and can use either of the two formulas i.e, cos (180° –θ) = – cosθ or cos (90° + θ) = – sinθ....
Find the exact value of cos C for the triangle shown on the right. 3 cm C2cm How does your answer to a) tell you that angle ACB must be obtuse4cm 相关知识点: 试题来源: 解析 The cosine rule cosC=(a^2+b^2-c^2)/(2ab) 1/(17):1/(16)=(2^2+3^2-4^2)/(1⋅7^2)=(...
5a/c(cos C^(2/3)well do How play you football (?) 相关知识点: 语法 动词 动词的分类 情态动词 试题来源: 解析 【答案】How well do you play football?【核心短语/词汇】How well:怎样,多好。【翻译】你足球踢得怎么样?【解析】根据题干中“?”和“How”(怎样),可知句子是How开头的特殊疑问句...
[C#]conversion from time to double [Help] Get the target path of shortcut (.lnk) [IndexOutOfRangeException: There is no row at position 0.] i find this error.. plz help me.. [IO] How to - Delete a file, keeping data in the stream? [Out Of Memory Error] while handling 400MB...
I find myself having less and less patience as I get older, for things that do something amazing on paper, but irl only on 3 specific devices and only while standing on your head and arm wrestling a kangaroo, on tuesdays. Tried this, & it was just another thing that started to work,...
This article demonstrates how to find empty cells and populate them automatically with a formula that adds numbers above and returns a total.Is it possible to quickly select all empty cells and then sum cells above to the next empty cell? Yes, I will show you how.Can I have a formula ...
Math: How to Find the Tangent Line of a Function in a Point Another application is finding extreme values of a function, so the (local) minimum or maximum of a function. Since in the minimum the function is at it lowest point, the slope goes from negative to positive. Therefore, the ...
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SCT's in my life (one C8, two 8" Meades and one 10" Meade) and two of the four are "freaky sharp" and the other two are really good. None of them are mush dogs. I realize it's a small sample size, but I'm glad I didn't need to go through 60 scopes to find a decent ...
We’re done with the main element, so let’s move to the pseudo-elements. Here as well, we need some geometry tricks to identify the size. We can easily find the height H from the previous figure we used to identify the gradient configuration. It’s equal to1lh/cos(a). For the wi...