If sin(α - β) = 1 and cos(α + β) = 1, where α and β are positive acute angles, then
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i. Epidermis - is the outermost protective layer made up of tabular (flattened) cells.
ii. Endothecium - is sub-epidermal layer made up of radially elongated cells with fibrous
thickenings of callose .
iii. Middle layer - is inner to endothecium and is made up of thin walled cells (1-2
layered), which may disintegrate in mature anther.
iv. Tapetum - is the inner most nutritive layer of anther wall. It immediately encloses the
sporogenous tissue (microspore mother cells
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Therefore we can conclude that when sin(α−β)=12 and cos(α+β)=12 , then the values of α and β are 45∘ and 15∘ respectively which are positive acute angles.
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