a × a−1 = 1
True
False
a−1 = 1a So, a × a−1 = 1
If A is involutary then|A|=1 or −1
If ax=b,by=c and cz=a then xyz=1
State True/False
In any ΔABC where ∠B=90∘, sin2A+cos2C=1
In any △ABC where ∠B=90∘, then sin2A+cos2C=1
We can express (50−1)49 as(50−1)49=5k−1