If for some \theta lying between 0^{\circ} and 90^{\circ}, \tan \theta=1, then what is the value of \sin ^{2} \theta-2 \sin \theta \cos \theta ?

UPSC CDS 2 2021 Math Paper

Question : 42 of 100

Marks: +1, -0

If for some θ lying between 0∘ and 90∘,tan‌θ=1, then what is the value of sin2θ−2‌sin‌θ‌cos‌θ ?

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