1003108203

Level: 
Project ID: 
1003108203
Accepted: 
1
Compare the definite integral \( I=\int\limits_0^{\frac{\pi}4}\frac{\cos⁡2b}{\cos^2⁡b}\,\mathrm{d}b \) to the number \( \frac{\pi}2 \).
\( I \) is smaller than \( \frac{\pi}2 \) by \( 1 \).
\( I \) is bigger than \( \frac{\pi}2 \) by \( 1 \).
\( I \) is equal to \( \frac{\pi}2 \).
\( I \) is smaller than \( \frac{\pi}2 \) by \( \frac{\pi}4 \).