False,
Defense:
We realize that,
sin θ increments when 0° ≤ θ ≤ 90°
cos θ diminishes when 0° ≤ θ ≤ 90°
What’s more, (sin 80°-cos 80°) = (expanding esteem diminishing worth)
= a positive worth.
Subsequently, (sin 80°-cos 80°) > 0.
The value of the expression (sin 80° – cos 80°) is negative.
The value of the expression (sin 80° – cos 80°) is negative.