Can You tell me how to find the value of cot squared 20 +cot squared 40 +cot squared 80?
542378
Assuming you are using degrees, the answer is 9. If you're looking for the square root of that, it would be 3. \n\nIf you want to figure it out yourself, remember that cot is 1/tan, cot^2 = 1 / tan^2.
714084
plug in cos^-1(30/50) in a calculator\nto get cos^-1 just hit 2nd cos
958531
2x+80-x=120\nx=40 double \n80-x=40 single.
943973
Tangent 25° 56' 30" = cot (90 - A)\n\n89 59 60\n25 56 30\n- - - - - - -\n\n64 3 30\n\nCotangent 64 degrees 3 minutes 30 seconds\n\nThe answer is. The complemenary angle of tangent 25° 56' 30" is cotangent  64° 3' 30 "\n\n- - - - - - - - - - - -s-
951977
-60 + 20x = 24x +72\n-60 = 4x +72\n-132 = 4x\n-33 =x
126044
Stand on your head.\n\n16=8+8 and you haven't even changed the equation...(including what direction it's facing)
885282
Let x and y be the other two sides \n\n18 is hypotenuse \n=>x<18,y<18\n\nx+y+18=40\nx+y=22------------------1\n\nx^2+y^2=(18)^2=324----------2------Pythagoras theorem\n\nx^2+(22-x)^2=324---------------------Put 1 in 2\n\nSimplify,\nx^2 + 484 -44x +x^2=324\n\n2 x^2  - 44x +160 =0\n\nx^2 -22x +80=0\n\nSolve to get x,\nonly 1 of two value is possible\n(Other is discarded if<0 or >18\nor  will be y value if 2 values add up to 22).
287407
3(16 y_squared - 24xy + 9 x_squared)
929375
simplify\n-12x -8 = 18x - 18\nadd 12x to both sides\n-12x +12x -8 = 18x +12x - 18\n-8 = 30x -18\nnow add 18 to both sides\n-8 + 18 = 30x - 18 + 18\n10 = 30x\ndivide both sides by 30 \nx = 1/3
528350
(5x + 4)(6x + 4)\n30x^2 + 20x + 24x + 16\n30x^2 + 44x + 16\nANS : 16
835259
I'll give you a hint and let you try to figure out the rest yourself (unless someone else tells you the exact answer). =)\n\nUse your trig identities:\n\ntan A = sinA/cosA\n\ncot A = 1/tanA or cot A = cosA/sinA
697247
C = (W^2*L^2) / (24T^2)\nC(24T^2) = W^2*L^2\n[C(24T^2)]/L^2 = W^2\nAnswer:\nW = sq.rt {[C(24T^2)]/L^2}
738486
8w-18 = 12w +14\n    +18           +18    add 18 on both sides\n\n    8w=12w + 32\n-12w   -12w          subtract 12w on both sides\n\n  -4w=32             solve for w\n   /-4    /-4\n\n   w= -8
263848
cot = o/a\ncsc = r/o\n\no = opposite side\na = adjacent side\nr = radius\n\ncalculate csc(2x) in terms of o and r.\nSubstitute o/a for cot(x) and substitue the value you determine for csc(2x) \nmultiply these, then convert to a trig function in terms of x.\n\nIf you know trig identities better than I do, you can reduce this expression using identities, without resorting to o, a, and r.  However, either route will work.
809968
(tan x- cot x)/( tan x + cot x)+ 2cos^2 x=1\n\nSenx / cos x  - cosx/senx\n---------------------------------  + 2cos^2x\nSenx / cos x  + cosx/senx\n\n(sen^2 x - cos^2x) / senx cosx\n--------------------------------------  + 2cos^2 x\n(sen^2 x + cos^2x) / senx cosx\n\nThe fraction reduces on the above:\n\nsen^2 x - cos^2 x                       + 2 cos^2 x\n\nsen^2x + cos^2x = 1\n\nproved!
538653
Just put each number in for x and see what the answer is.  Example : -11/2 + 75 = -5.5 + 75 = $69.50 a unit.
949562
Use csx =1/sin and  1-cos^2=sin^2  and cot=cos/sin\n Ready...Go\ncscx - (cosx)(cotx) =  1/sin - cos^2/sin = (1-cos^2)/sin=sin^2/sin =sin\n       ole, ole , infree