सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

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in the afternoon in the given direction and no shadow in
the morning.
Analytically, the event of having two shadows arises
on account of the following circumstance. When we are
asked to find Iṣṭākṣajyā from Rs / (H sin a) the shadow in the
given direction on the equinoctial day (Ref. gL fig. 45)
the L for this given value of the shadow is given by
H sin L = RS / √(12² + S²) where S = Rs / (H sin a). We know
sin θ = a has two solutions, θ₁ and 180 − θ₁. Hence L
will have two values L₁ and 180 − L₁. So, Bhāskara has
asked us to compute D₁ and D₂ from L₁ and L₂ and thus
have the two solutions.
Fig. 50