L30_A
8.3 Powers and products of Trigonometric functions (續.三角函數的次數和乘積)
Part II: Other trigonometric functions (Conti.)

L30_B
8.4 Integrals involving √a²±x², √x²-a²; trigonometric substitution (三角替代法)
 

L30_C
8.5 Partial Fractions (部分分式)