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2 2*sin (x) + 5*cos(x) = 4
a*w^2 + b*w + c = 0
D = b^2 - 4 * a * c =
(5)^2 - 4 * (-2) * (-2) = 9
w1 = (-b + sqrt(D)) / (2*a)
w2 = (-b - sqrt(D)) / (2*a)
-pi x1 = ---- 3
pi x2 = -- 3
/ ___\ |\/ 3 | x3 = -2*I*atanh|-----| \ 3 /
/ ___\ |\/ 3 | x4 = 2*I*atanh|-----| \ 3 /
x4 = 2*i*atanh(sqrt(3)/3)
suma
/ ___\ / ___\ pi pi |\/ 3 | |\/ 3 | - -- + -- - 2*I*atanh|-----| + 2*I*atanh|-----| 3 3 \ 3 / \ 3 /
=
0
producto
/ ___\ / ___\ -pi pi |\/ 3 | |\/ 3 | ----*--*-2*I*atanh|-----|*2*I*atanh|-----| 3 3 \ 3 / \ 3 /
=
/ ___\ 2 2|\/ 3 | -4*pi *atanh |-----| \ 3 / -------------------- 9
-4*pi^2*atanh(sqrt(3)/3)^2/9
x1 = 3423.28879486168
x2 = 17.8023583703422
x3 = -61.7846555205993
x4 = 99.4837673636768
x5 = -222111.64780635
x6 = -9149.36500480467
x7 = 80.634211442138
x8 = 63.8790506229925
x9 = -86.9173967493176
x10 = -45.0294947014537
x11 = 95.2949771588904
x12 = 70.162235930172
x13 = -26.1799387799149
x14 = -99.4837673636768
x15 = -38.7463093942741
x16 = 13.6135681655558
x17 = 24.0855436775217
x18 = 82.7286065445312
x19 = -17.8023583703422
x20 = 93.2005820564972
x21 = -80.634211442138
x22 = -42.9350995990605
x23 = 68.0678408277789
x24 = -49.2182849062401
x25 = -13.6135681655558
x26 = 32.4631240870945
x27 = -57.5958653158129
x28 = 74.3510261349584
x29 = 283.790536374278
x30 = -164.410015537866
x31 = 86.9173967493176
x32 = -55.5014702134197
x33 = -68.0678408277789
x34 = 51.3126800086333
x35 = 36.6519142918809
x36 = 7.33038285837618
x37 = 19.8967534727354
x38 = 76.4454212373516
x39 = 38.7463093942741
x40 = -32.4631240870945
x41 = 55.5014702134197
x42 = -51.3126800086333
x43 = -5.23598775598299
x44 = 30.3687289847013
x45 = -19.8967534727354
x46 = 57.5958653158129
x47 = 61.7846555205993
x48 = 5.23598775598299
x49 = -11.5191730631626
x50 = -1.0471975511966
x51 = -7.33038285837618
x52 = -30.3687289847013
x53 = -70.162235930172
x54 = -93.2005820564972
x55 = -24.0855436775217
x56 = -95.2949771588904
x57 = 11.5191730631626
x58 = -89.0117918517108
x59 = -63.8790506229925
x60 = 49.2182849062401
x61 = 42.9350995990605
x62 = 233.525053916841
x63 = -76.4454212373516
x64 = 45.0294947014537
x65 = 1.0471975511966
x66 = 26.1799387799149
x67 = 89.0117918517108
x68 = -36.6519142918809
x69 = 162.315620435473
x70 = -82.7286065445312
x71 = -74.3510261349584
x71 = -74.3510261349584