Question

one question plz help me ​

Answer 1

as we know 2sinxcosx=sin2x

cos^2 2x=1-sin^2 2x

sinx +cosx -sqrtsin2x=0

squaring both the sides

2sinx^2cosx^2=1-2sin^2 2x

2sin^2 2x=2cos^2 2x

tan^2 2x=1

2x=45

x =22.5°