State True/False
In any ΔABC where ∠ B=90 ∘, sin2A + cos2C = 1.
False
Given that, sin2A + cos2C=1
But we know that sin2C + cos2C =1
∴if sin2A+cos2C=1, then ∠A=∠C
But ∠A=∠C only if △ABC is isosceles.
Therefore the above statement is not always true.