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Contoh 22

1) [pic]

= [pic]

= [pic]

= y + C

= tan [pic]

Atau

Cos x = cos2x – sin2x

2 cos2x = cos 2x+1

[pic]

Misal u = [pic]

Atau dx = 2du

[pic]

= tan [pic]

Contoh 22

Soal no 1 bandingkan dengan

[pic]

= [pic]

= [pic]

= [pic]

= tan(x) - [pic]

= tan x + [pic]

= [pic]

= [pic]

2) [pic]

= [pic]

= -[pic]

= -[pic]

a = 1

2b = -2 → b = -1 p = [pic]

C = -1 = [pic]

= [pic]

= [pic]

[pic] arc tan [pic]

[pic]

[pic]

Sin x = [pic]

Y = tan[pic]

4). [pic]

[pic]

[pic]

en + C

en [pic]

cara lain

[pic]

Misal u = [pic]

[pic]

= [pic]

= [pic]

Misal u = tan u

dw = [pic]

= [pic]

= en[pic]

= en [pic]

= en [pic]

tan [pic]= [pic]

= [pic]

= [pic]

= [pic]

= cos x – cot x

= [pic]

= [pic]

= [pic]

= [pic]

[pic]

Cosx = 2[pic]

Cn x = 1-2[pic]

Sin x = 2 sin[pic]

[pic]

[pic]

[pic]

[pic]

= [pic]

d(tanx) = [pic]

d[pic]

[pic]

[pic]

Misal = y = sinx

dy = cnx dx

[pic]

[pic]

[pic]

= [pic]

[pic]

[pic]

Misal u = 1+y v = 1-y

du = dy du = 1- dy

[pic]

[pic]+C

[pic]

[pic]

[pic]

[pic]

= [pic]

Y = cos x

Dy = -sinx dx

Sin2x = 1-cn2x

= 1-y2

Lihat sec

[pic]

[pic]

-----------------------

1+[pic]

2y

x

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