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In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [ 1][ 2] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths. They are widely used in all sciences that are related to geometry, such as navigation, solid mechanics, celestial ...
The hyperbolic functions may be defined in terms of the legs of a right triangle covering this sector. In complex analysis, the hyperbolic functions arise when applying the ordinary sine and cosine functions to an imaginary angle. The hyperbolic sine and the hyperbolic cosine are entire functions. As a result, the other hyperbolic functions are ...
A right triangle with sides relative to an angle at the point. Inverse trigonometric functions are useful when trying to determine the remaining two angles of a right triangle when the lengths of the sides of the triangle are known. Recalling the right-triangle definitions of sine and cosine, it follows that.
This section is an excerpt from Tangent vector. [ edit] In mathematics, a tangent vector is a vector that is tangent to a curve or surface at a given point. Tangent vectors are described in the differential geometry of curves in the context of curves in R n. More generally, tangent vectors are elements of a tangent space of a differentiable ...
Vietnam Television ( Vietnamese: Đài Truyền hình Việt Nam ), operating under its official abbreviation VTV, is the national television broadcaster of Vietnam. As the state broadcaster under the direction of the government of Vietnam, VTV is tasked with "propagating the views of the Party, policies, laws of the government".
China Railway staff livestreaming on the first day operation of Beijing Fengtai railway station on 20 June 2022 during COVID-19 Pandemic era.. Livestreaming, live-streaming, or live streaming is the streaming of video or audio in real time or near real time.
Vertical tangent. Vertical tangent on the function ƒ ( x) at x = c. In mathematics, particularly calculus, a vertical tangent is a tangent line that is vertical. Because a vertical line has infinite slope, a function whose graph has a vertical tangent is not differentiable at the point of tangency.
Online consultations or e-consultations refer to an exchange between government and citizens using the Internet. They are one form of online deliberation. Further, online consultation consists in using the Internet to ask a group of people their opinion on one or more specific topics, allowing for trade-offs between participants.