2017年11月1日 · As #pi/24=180^@/24=(7 1/2)^@#, let us first work out #cos(pi/12)# or #cos15^@#. #cos15^@=cos(45^@-30^@)# = #cos45^@cos30^@+sin45^@sin30^@#

2018年4月5日 · A Trigonometric Identity: cos(x)=sin(pi/2-x) SO cos(pi/24)=sin(pi/2-pi/24) cos(pi/24)=sin((12pi)/24-pi/24) cos(pi/24)=sin((11pi)/24) --> A is your answer

2018年5月14日 · Fun. I don't know how to do this one offhand, so we'll just try some things. There don't appear to be complementary or supplementary angles obviously in play, so perhaps our best move is to start with the double angle formula.

2015年8月30日 · How do you find the exact values of cos(13pi/24)sin(31pi/24) using the half angle formula? Trigonometry Trigonometric Identities and Equations Half-Angle Identities 1 Answer

2015年11月6日 · (11pi)/24 ; (23pi)/24 ; (33pi)/24 , (35pi)/24 Trig Table and unit circle --> tan (pi/4) = 1 and tan (pi/4 + pi) = tan ((5pi)/4) = 1 Substitute in the right side of ...

or #4x- pi/3 = (5 pi)/6+2 pi k# for integer #k#. Adding # pi/3# in the form #(2 pi)/6# to both sides of these equations gives us: #4x = (3 pi)/6+2 pi k = pi/2+2 pi k# for integer #k# or #4x = (7 pi)/6+2 pi k# for integer #k#. Dividing by #4# (multiplying by #1/4#) gets us to: #x= pi/8+(2pi k)/4# or #x=(7 pi)/24+(2 pi k)/4# for integer #k#.

2017年1月17日 · Calculus . Science Anatomy & Physiology

2016年12月21日 · How do you express #sin(pi/12) * cos(pi/8 ) # without products of trigonometric functions? Trigonometry Trigonometric Identities and Equations Products, Sums, Linear Combinations, and Applications 1 Answer

The chord AB of length 12 in the above figure runs from #pi/12# to #pi/6# in the circle of radius r and center O, taken as origin .

2018年6月11日 · We know that, #color(red)((1)sinC-sinD=2cos((C+D)/2)sin((C-D)/2)# #color(blue)((2)cos(pi/2-theta)=sintheta# Here,