secA=(125) for some value of angle A. Is it True/False?
The correct option is B (True)
Given secA=125=HypotenuseBase
Let ΔMNC be a right angled triangle such that MC=12k and NC=5k as shown in figure.
By Pythagoras theorem, we get
MC2=MN2+NC2
⇒(12k)2=MN2+(5k)2
⇒144k2=MN2+25k2
⇒MN2=144k2−25k2
⇒MN2=119k2 which exists for at least some real number k.
Therefore, secA=125 exist for some value of angle A.
Hence, the statement is true.