Question

sinx + cosx = a then | sinx - cosx | = ??
a) √1-a²
b) √a²-1
c) √2-a²
d) √a²-2
answer with full method pls​

Answer 1

Ans is c option . Let|sinx - cosx| =K then square both sides . And also square both sides sinx + cosx =a you will get your answer