Trigonometric identity — task. Maths CBSE Live product, Class 10.

1. \(\cos x\) \(=\)

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

2. \(\cot^2 x\) \(=\)

\(\tan^2 \: x - 1\)
\(\tan^2 \: x + 1\)
\(\text{cosec} \: x - 1\)
\(\text{cosec}^2\: x - 1\)

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