Question

Tan square a minus 10 square b is equal to sin square minus sin square b divided by cos square a into cos square b

Answer 1

Step-by-step explanation:

${ \tan }^{2} a - { \tan }^{2} b$

$\frac{ { \sin}^{2}a}{ { \cos}^{2}a } - \frac{ { \sin}^{2}b}{ { \cos}^{2}b}$