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Question: \(\left\lbrack - \frac{\pi}{2},\frac{\pi}{2} \right\rbrack\) is equal to-...

[−π2,π2]\left\lbrack - \frac{\pi}{2},\frac{\pi}{2} \right\rbrack is equal to-

A

[−2,2]\lbrack - \sqrt{2},\sqrt{2}\rbrack

B

1+x2x2\frac{1 + x^{2}}{x^{2}}

C

0

D

1

Answer

[−2,2]\lbrack - \sqrt{2},\sqrt{2}\rbrack

Explanation

Solution

Use expansion.