Question

solve the trigonometry

Answer 1

hope it is helpful to u

Answer 2

Answer:

given,

cosA = ⅖

so,

secA = 5/2

=> sec²A = 25/4

now

4 + 4 tan²A

= 4( 1 + tan²A)

= 4sec²A

$4 \times \frac{25}{4}$

= 25 .