Question

If sinA=2/5,then value of 21+21tan²A is

Answer 1

Step-by-step explanation:

if sinA= 2/5

then ...

sinA= P/H =2/5

then

tanA= P/B= 2/√21

now,

=21+21tan^2A

=21+21(2/√21)^2

=21+21(4/21)

=21+4

=25

it's the required answer

hope it helpful