state gov Bihar Police Constable (सिपाही) Mock Test Series 2025 Quantitative Aptitude Trigonometry

यदि sinA + sin2A = 1, तो व्यंजक (cos2 A + cos4A) का मान ______ है।

1
\(\frac{3}{2}\)
2
1
3
2
4
\(\frac{1}{2}\)
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