Class 11MathematicsTrigonometrical EquationsMix Examples-Trigonometrical Equations and Inequations, Properties of Triangles, Height and Distance
DifficultFor a $\Delta ABC$,if $a \cos^2 \frac{C}{2} + c \cos^2 \frac{A}{2} = \frac{3b}{2}$,then the sides $a, b, c$ are in:
- AArithmetic Progression $(AP)$
- BGeometric Progression $(GP)$
- CHarmonic Progression $(HP)$
- DSatisfy $a + b - c = 0$
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