SSC ICMR Assistant Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

यदि 7 – 2sin2θ – 11cosθ = 0, जहां 0° < θ < 90° तो θ का मान ज्ञात कीजिये 

1
90° 
2
60° 
3
30° 
4
45° 
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