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3.Trigonometrical Ratios, Functions and Identities
easy
The value of $\sin 10^\circ + \sin 20^\circ + \sin 30^\circ + ... + $ $\sin 360^\circ $ is
A
$1$
B
$0$
C
$-1$
D
None of these
Solution
(b) Since $\sin 190^\circ = – \sin 10^\circ ,\;\sin 200^\circ = – \sin 20^\circ ,$
$\sin 210^\circ = – \sin 30^\circ ,\;\sin 360^\circ = \sin 180^\circ = 0$ $etc.$
Standard 11
Mathematics
