8. Introduction to Trigonometry
easy

सत्य या असत्य लिखिए और अपने उत्तर का औचित्य दीजिए :

व्यंजक $\left(\sin 80^{\circ}-\cos 80^{\circ}\right)$ का मान ऋणात्मक है।

Option A
Option B
Option C
Option D

Solution

False

We know that, sine is increasing when, $0^{\circ}<\theta<90^{\circ}$ and $\cos \theta$ is decreasing when, $0^{\circ}<\theta<90^{\circ}$

$\therefore \quad \sin 80^{\circ}-\cos 80^{\circ}>0 \quad \text { [positive] }$

Standard 10
Mathematics

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