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The least value of 3cos2α + 4sin2 α is:1). –32). 33). –44). 4 |
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Answer» 3 cos2α + 4 sin2 α = 3 cos2α + 4 (1 – cos2 α) = 4 – cos2 α The minimum value occurs when cos α = 1 So minimum value is = 4 – 1 = 3 |
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