alleryStart learning →The value of $\cos 0^\circ$ is
A1
B0
C$\dfrac{1}{2}$
D$\dfrac{\sqrt3}{2}$
Answer & Solution
Correct answer: A. 1
1. From the standard-angle table, $\cos 0^\circ = 1$.
2. (And $\sin 0^\circ = 0$, $\tan 0^\circ = 0$.)
3. So $\cos 0^\circ = 1$.
_Source: Karnataka SSLC (KSEEB) Class 10 Mathematics, Ch11 'Introduction to Trigonometry', §11.2_
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