Решите тождество 2 sin^2 (45-2t) + sin 4t=1

[latex]Formyla:\; \; sin^2 \alpha =\frac{1-cos2 \alpha }{2}\; \; \Rightarrow \; \; 2sin^2 \alpha =1-cos2 \alpha \\\\ \alpha =45-2t\; \; \Rightarrow \; \; 2 \alpha=90-4t\\\\cos2 \alpha =cos(90-4t)=sin4t\\\\\\2sin^2(45-2t)+sin4t=1-cos(90-4t)+sin4t=\\\\=1+sin4t-sin4t=1[/latex]