Question

Please help by clicking on attached :O

Answer 1

i clicked on the attached. glad to help :D

Answer 2

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Answer 3

\[\cos A=-2/5 \]
then
\[\cos ^{2} A= 4/25\]
also
\[1- \cos ^{2} A= \sin ^{2} A= 1- 4/25\]
from here you have value of sin
divide it by value of cos
as in 3rd quadrant tan is always positive so answer should be positive. . .
@IloveCharlie

Answer 4

Ok thank you, so I got the second option. Can you please clarify?

Answer 5

@theyatin

Answer 6

yeah its good. . .