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Relation between Inverses of Trigonometric Functions and Their Reciprocal Functions

1 - cos2A is ...

Question

$1 - \cos^{2} A$ is equal to ?

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Solution

We know that,
$\sin^{2} A + \cos^{2} A = 1$
⇒ $1 - \cos^{2} A = \sin^{2} A$
Therefore, $1 - \cos^{2} A$ is equals to $\sin^{2} A$

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