✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
$\int \frac{dx}{\sqrt{25 - 16x^2}}$ is equal to :
A
$\frac{1}{5} \sin^{-1} 4x + C$
B
$\frac{1}{25} \sin^{-1} 16x + C$
C
$\frac{1}{4} \sin^{-1} \frac{4x}{5} + C$
D
$\frac{1}{16} \sin^{-1} \frac{4x}{5} + C$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 65-4 | Set 1 | Question 9 |
| CBSE 2026 | Series 65-4 | Set 2 | Question 7 |
| CBSE 2026 | Series 65-4 | Set 3 | Question 10 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)