For Class 12 Mathematics, explain or solve a integration by parts question from the chapter "Integrals". Focus on applied word problem and show the working clearly.
Step-by-step solution path
Read the topic idea: Integration by parts.
Recall the core explanation from the chapter: Mathematics syllabus chapter for Class 12.
Use the related formula "โซsin x dx = -cos x" as the main tool while solving.
Write the reasoning in simple school-level language before the final answer.
Final learning answer
This example is centred on Integration by parts. A strong solution should identify the correct data, apply โซsin x dx = -cos x, and explain each transition instead of jumping directly to the answer.