The value of cos229° + cos261° is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 1.
cos(90° - x) = sinx
cos2x + sin2x = 1
cos229° + cos261°
⇒ cos229° + cos2(90 - 29°)
⇒ cos229° + sin229° = 1
SSC CGL 2024 PYQ — Question 68
SSC CGL - 09 Sep 2024 - Shift 1 • Quantitative Aptitude • Q68