- Home
- Standard 10
- Mathematics
8. Introduction to Trigonometry
easy
કિંમત શોધો :
$\frac{\sin 18^{\circ}}{\cos 72^{\circ}}$
A
$0$
B
$-1$
C
$1$
D
$10$
Solution
$\frac{\sin 18^{\circ}}{\cos 72^{\circ}}=\frac{\sin \left(90^{\circ}-72^{\circ}\right)}{\cos 72^{\circ}}$
$=\frac{\cos 72^{\circ}}{\cos 72^{\circ}}=1$
Standard 10
Mathematics