Trigonometric Functions - Wikipedia

sec(pi/2). undefined.How many ms in 1 sec? The answer is 1000. We assume you are converting between millisecond and second . It is the angular diameter of an object of 1 unit diameter at a distance of 360×60×60/(2pi)...Вычислить sec(pi/2). Представим. через синусы и косинусы.

Convert ms to sec - Conversion of Measurement Units

The secant function can't be evaluated in pi/2. Just apply the definition and evaluate: sec(x)=1/cos Since the cosine function is positive before pi/2 and negative after, we will have that lim_{x\to (pi/2)...