Page 33 - BUKU KALIN (bismillah Fix)_Bab 1
P. 33
√9 − 2
sin 2 = 2 sin cos = 2 ( ) ( )
3 3
2
2
= √9 −
9
2. Selesaikan integral berikut.
5
2
∫
( + 1) 2
2
∶ = tan
2
= sec
5
2
∫
2
( + 1) 2
2
5
= ∫
2
2
2 ( + 1)( + 1)
2
5 sec
= ∫
2
2
2 (sec )(sec )
5
2
= ∫
2
5 1 1
= ∫ [ + cos 2 ]
2 2 2
5 1 1
= ( + sin 2 ) +
2 2 4
5 5
= + sin 2 +
4 8
