# CBSE Class 11-science Answered

**For any real x find the minimum and maximum value for the expression 3sin^2x +3sinxcosx + 7cos^2x.**

Asked by acv27joy | 10 Dec, 2018, 01:10: PM

Expert Answer

3sin

^{2}x +3sinxcosx + 7cos^{2}xUse cos2x = 1 - 2sin

^{2}x = 2cos^{2}x - 1sin2x = 2sinxcosx

Answered by Sneha shidid | 12 Dec, 2018, 09:49: AM

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