Question

If CosA=2/5,Then Find the value of 4+4tan²A

Answer 1

Answer:

25

Explanation:

1+tan^A=sec^A

=4(1+tan^A)

=4sec^A

=4×25/4

=25

Answer 2

Answer:

25

Explanation:

4 + 4 tan²A = 4(1+tan²A) = 4 Sec²

∵ 1+tan²A= Sec²A

Sec²A = (5/2)²

          = 25/4

∴ 4 × 25/4 = 25