Trigonometric identity — task. Mathematics CBSE, Class 10.

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1. \(\sin x\) \(=\)

\(\sqrt{1 + \cos x}\)
\(\sqrt{1 - \cos^2 x}\)
\(\sqrt{1 + \cos^2 x}\)
\(\sqrt{1 - \cos x}\)

2. \(\tan x\) \(=\)

\(\sqrt{\sec^2 x - 1}\)
\(\sqrt{\cot x - 1}\)
\(\sqrt{\sec x - 1}\)
\(\sqrt{\cot^2 x - 1}\)

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