Math & Physics Problems Wikia
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Problem

Indian astronomers used three major trigonometric ratios: “jya” (sine), “koti-jya” (cosine), and “utkrama-jya” (versine). The "utkrama-jya" (versine) is defined as .

Indian trig - Copy.jpg

Show that

.

Solution

We know that

.

Since

Therefore,

.
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