If cot B = 9, then what will be the value of sec2 B?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 82/81.
Calculations:
Cot B = 9/1
Base = 9 and perpendicular = 1
Using Pythagoras theorem, we get
⇒ Hypotenuse = 92 + 12 = √82
⇒ sec B = √82/9
⇒ Hence, sec2B = 82/81