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Pilihan Topik Matematika - at ee-cafe.org

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14.9. Integral Fungsi Hiperbolik<br />

Karena d(sinh v)<br />

= cosh v maka cosh vdv = sinh v + K<br />

Karena d(cosh v)<br />

= sinh vdv maka sinh vdv = cosh v + K<br />

Relasi diferensial dan integral fungsi hiperbolik yang lain termu<strong>at</strong><br />

dalam Tabel-13.1.<br />

Contoh: Carilah y =<br />

∫<br />

cosh( 2x<br />

+ 1)<br />

dx<br />

∫<br />

∫<br />

Misalkan<br />

dv<br />

dv<br />

v = 2x<br />

+ 1→<br />

= 2 → dx =<br />

dx<br />

2<br />

1<br />

sinh<br />

2<br />

1<br />

y =<br />

∫<br />

cosh(2x<br />

+ 1) dx =<br />

∫<br />

cosh( v)<br />

dv =<br />

2<br />

1<br />

= sinh(2x<br />

+ 1) + K<br />

2<br />

Soal-Soal: Carilah integral berikut<br />

v + K<br />

∫<br />

sinh<br />

x<br />

x 2 sinh x<br />

2<br />

dx ;<br />

∫<br />

tanh xdx ;<br />

∫<br />

cosh 2xdx<br />

;<br />

∫<br />

dx ;<br />

∫<br />

tanh xdx<br />

4<br />

cosh x<br />

14.10. Integral Menghasilkan Fungsi Trigonometri Inversi<br />

Integral fungsi-fungsi yang berbentuk<br />

∫<br />

dv<br />

1 − v<br />

2<br />

dv<br />

,<br />

∫ +<br />

2<br />

1 v<br />

dv<br />

∫<br />

dan setrusnya mulai nomer 20 sampai 31,<br />

2<br />

v v −1<br />

menghasilkan fungsi-fungsi trigonometri inversi.<br />

Contoh: Carilah y =<br />

∫<br />

dx<br />

2<br />

1 − 4x<br />

,<br />

181

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