The value of (4 ^2A − 4 ^2A) is equal to : - Vidyadip

MCQ

The value of $(4\tan^2A − 4\sec^2A)$ is equal to :

A
$−1$
✓
$−4$
C
$0$
D
$4$

✓

Answer

Correct option: B.

$−4$

$4\tan^2A − 4\sec^2A $
$= 4\tan^2A − 4(1 − \tan^2A)$
$= 4\tan^2A − 4 − 4\tan^2A$
$= −4$

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