The value of the expression (sin 800-cos 800) is negative.


False

We know,


sin θ increases when 0° ≤ θ ≤ 90°


cos θ decreases when 0° ≤ θ ≤ 90°


And (sin 80°-cos 80°) = (increasing value-decreasing value) which is always equal to a positive value.


(sin 80°-cos 80°) > 0, which is positive (not negative).


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