2025年3月13日 · cosine, one of the six trigonometric functions, which, in a right triangle ABC, for an angle A, is cos A = length of side adjacent to angle A / length of hypotenuse. (The other five trigonometric functions are sine [sin], tangent [tan], secant …

2025年2月7日 · Trigonometry, the branch of mathematics concerned with specific functions of angles. There are six functions commonly used in trigonometry: sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc). Learn more …

cosplay, the act or practice of dressing up as a character from a preexisting work of fiction.The term is derived from a Japanese portmanteau—kosupure—drawn from the words kosuchuumu (“costume”) and pure (“play”). Cosplay has become commonplace among fans of stories and characters depicted in various forms of mass media, including anime, comic books, video …

2025年2月14日 · trigonometric function, in mathematics, one of six functions (sine [sin], cosine [cos], tangent [tan], cotangent [cot], secant [sec], and cosecant [csc]) that represent ratios of sides of right triangles.

2025年3月1日 · opportunity cost, In economic terms, the opportunities forgone in the choice of one expenditure over others.For a consumer with a fixed income, the opportunity cost of buying a new dishwasher might be the value of a vacation trip never taken or …

2025年2月14日 · Tangent, one of the six trigonometric functions, which, in a right triangle ABC, for an angle A, istan A = length of side opposite angle A length of side adjacent to angle A .The other five trigonometric functions are sine (sin), cosine (cos), secant (sec), cosecant (csc), and cotangent (cot).

Secant, one of the six trigonometric functions, which, in a right triangle ABC, for an angle A, issec A = length of hypotenuse length of side adjacent angle A .(The other five trigonometric functions are sine [sin], cosine [cos], tangent [tan], cosecant [csc], and cotangent [cot].)

2023年12月5日 · Così fan tutte, comic opera in two acts by Wolfgang Amadeus Mozart that premiered in Vienna on January 26, 1790. It is the last of his three operas with librettist Lorenzo da Ponte, the first two being The Marriage of Figaro (1786) and Don Giovanni (1787).. Background and context. The storyline of the opera turns on a conceit: two young men, …

5 天之前 · Euler’s formula, either of two important mathematical theorems of Leonhard Euler. The first says e^ix = cos x + i sin x. When x = π or 2π, e^iπ = −1 and e^2iπ = 1, respectively. The second relates the number of faces, vertices, and edges of any polyhedra.

2025年3月13日 · Sine, one of the six trigonometric functions, which, in a right triangle ABC, for an angle A, issin A = length of side opposite angle A length of hypotenuse .(The other five trigonometric functions are cosine [cos], tangent [tan], secant [sec], cosecant [csc], and …