Question

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

Answer 1

Answer:

25

Explanation:

cosA=2/5

so, secA=5/2

by squaring

sec^2A=25/4

1+tan^2A=sec^2A (this is an identity may you have learnt)

tan^2A=sec^2A-1

=21/4

putting in question We get

4+21

=25 Ans

Answer 2

25 is the to the question