Question

13) tg²a-sin²a tg²a; ​

Answer 1

Ответ:

sin²a

Пошаговое объяснение:

ответ на фотографии

Answer 2

To simplify the expression $\tan^2(a) - \sin^2(a) \tan^2(a)$, you can factor out a common factor of $\tan^2(a)$:

$\tan^2(a) - \sin^2(a) \tan^2(a) = \tan^2(a) \left(1 - \sin^2(a)\right)$.

Now, you can use the trigonometric identity $1 - \sin^2(a) = \cos^2(a)$:

$\tan^2(a) \left(1 - \sin^2(a)\right) = \tan^2(a) \cos^2(a)$.

So, the simplified expression is $\tan^2(a) \cos^2(a)$.