MCQ
જો $\cos x + {\cos ^2}x = 1,$ તો ${\sin ^2}x + {\sin ^4}x =$
- ✓$1$
- B$-1$
- C$0$
- D$2$
$\Rightarrow \,\,\cos x = {\sin ^2}x$
$\therefore \,\,{\sin ^2}x + {\sin ^4}x = \cos x + {\cos ^2}x = 1$.
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