alleryStart learning →If $\tan A = 1$, then the acute angle $A$ is
A$30^\circ$
B$45^\circ$
C$60^\circ$
D$90^\circ$
Answer & Solution
Correct answer: B. $45^\circ$
1. $\tan A = 1$ means opposite = adjacent.
2. This occurs at $A = 45^\circ$ (since $\tan 45^\circ = 1$).
3. So $A = 45^\circ$.
_Source: Karnataka SSLC (KSEEB) Class 10 Mathematics, Ch11 'Introduction to Trigonometry', §11.2_
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