If 0 \leq \\alpha, \\beta\\leq 90^\circ such that \cos ( \\alpha-\\beta)=1, then what is \sin \\alpha-\sin \\beta+\cos \\alpha-\cos \\beta equal to?

UPSC CDS 2 2020 Math Paper

Question : 22 of 100

Marks: +1, -0

If 0≤α,β≤90° such that cos(α−β)=1, then what is sin‌α−sin‌β+cos‌α−cos‌β equal to?

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