What is (pi)/2 radians in degrees? - Socratic
2015年12月15日 · What is #(pi)/2 # radians in degrees? Trigonometry Graphing Trigonometric Functions Radian Measure. 1 ...
Proving Identities - Trigonometry - Socratic
The best videos and questions to learn about Proving Identities. Get smarter on Socratic.
Double Angle Identities - Trigonometry - Socratic
You would need an expression to work with. For example: Given #sinalpha=3/5# and #cosalpha=-4/5#, you could find #sin2 alpha# by using the double angle identity
How do you simplify #cos(x+pi/2)#? - Socratic
2016年9月30日 · Use the known trigonometric identity . #cos(a+b)=cosa*cosb-sina*sinb# we have that. #cos(x+pi/2)=cosx*cos(pi/2)-sinx*sin(pi/2)=cosx*0-sinx*1=-sinx#
How do you find the exact value of sec (π/2)? - Socratic
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 [-10, 10, -5, 5]}
How do you find the limit of # (x-pi/2)tanx# x as it ... - Socratic
2015年9月25日 · #(x-pi/2)tanx = (x-pi/2)sinx/cosx#. Since #lim_(xrarrpi/2)(x-pi/2) = 0#. we should consider trying to use #lim_(thetararr0)sintheta/theta = lim_(thetararr0)theta ...
How do you prove arcsin x + arccos x = pi/2? - Socratic
2016年3月12日 · This one is trickier than it looks. The other answer doesn't pay it the proper respect. A general convention is to use the small letter #arccos(x)# and #arcsin(x)# as multivalued expressions, each respectively indicating all the values whose cosine or sine has a …
Half-Angle Identities - Trigonometry - Socratic
How do you find sin (x/2), given cos x = -5/8, with π/2 < x < π? How do you find the value of the sin of θ/2 given that cos a = 5/13 and a is in Quadrant IV? How do you find the value of tan of θ/2 given that cos a = -4/5 and a is in Quadrant II?
Amplitude, Period and Frequency - Trigonometry - Socratic
How do you write an equation of the cosine function with amplitude of 2, period of 2π/3, phase shift of π/6, and a vertical shift of 1? What is the period of the function #y= -2 cos(4x-pi) -5#? What is the period of the function #y = cos 4x#?
Find the second Taylor's expansion of the function …
2018年4月17日 · The Taylor expansion for a function of two variables (up to the second order) is. #f(x,y) = f(x_0,y_0)# #qquad +((del f)/(del x))_{(x_0,y_0)}(x-x_0)+((del f)/(del y ...