If sinA = - , A lies in III quadrant, the value of secA is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. - .
Given that
If sinA = - ,
A lies in III quadrant
This means that the tan A and cot A values are only positive.
According to the question
⇒ SinA = - = P/H
⇒ B2 = H2 - P2
⇒ B2 = 25 - 9 = 16
⇒ B = 4
As we know,
secA = H/B = - 5/4