2016年1月10日 · If we draw the graph of y=sexc we see that at x=pi/2 there is a vertical asymptote and hence no output y-value. That is, lim_(x->pi/2)secx does not exist. graph{secx [ …

2015年10月16日 · The secant function can't be evaluated in pi/2. Just apply the definition and evaluate: sec(x)=1/cos(x) Thus, sec(pi/2)=1/cos(pi/2) But since cos(pi/2) is zero, this division is …

2016年8月13日 · sec^{-1}(2) = pi/3 Let the answer be x. Since sec^{-1}(2) = x, sec(x) = 2. As secant is the reciprocal of the cosine function, i.e. sec(x) = 1/cos(x), the following must be true …

2016年10月24日 · - csc x sec (x + pi/2) = 1/(cos (x + pi/2)) Since cos ((x + pi/2) = - sin x, there for: sec (x + pi/2) = -1/sin x = - csc x

2018年3月12日 · sec -(pi/2) = oo -(pi/2) = 2pi - pi/2 = (3pi)/2. It’s in III quadrant. As per unit circle, coordinates are (0,-1) cos theta = cos (-pi/2) = cos (pi/2) = 0 Hence sec ...

2016年3月26日 · sec^2(pi/3)=4 As cos(pi/3)=1/2, sec(pi/3)=1/(cos(pi/3))=1/(1/2)=2 Hence sec^2(pi/3)=2^2=4

2015年9月23日 · Why does sec (pi/4) = sqrt2 sec ((pi)/4) = 1/(cos (pi/4)) Trig Table of Special arcs gives --> cos (pi/4) = sqrt2/2.

2016年5月7日 · How do you use inverse trigonometric functions to find the solutions of the equation that are in

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2015年9月7日 · sec^2(pi/3) = 4 sec(pi/3) = 1/cos(pi/3) color(white)("XXXX")= 1/(1/2) = 2 sec^2(pi/3) = 2^2 = 4