Question

cos 2x + 2 sin ^2x = 1

Answer 1

$\huge \underbrace \mathfrak \blue{Solution}$

$\tt \huge \longmapsto \: cos \: 2x + 2 {sin}^{2} \: x = 1 \\ \\ \tt \huge \longmapsto \: 2 {cos}^{2} x - 1 + 2 {sin}^{2} x = 1 \\ \\ \tt \huge \longmapsto \: 2( {cos}^{2} \: x + {sin}^{2} \: x) - 1 = 1 \\ \\ \tt \huge \longmapsto \: 2 \times 1 - 1 = 1 \\ \\ \tt \huge \longmapsto \: 2 - 1 = 1 \\ \\ \tt \huge \longmapsto \: 1 = 1 \\ \\ \tt \huge \longmapsto \red{hence \: proved}$

Answer 2

Step-by-step explanation:

please mark as brainliest,also follow me.....