सरलतम रूप में लिखे ।
`tan^(-1)(sqrt((1-cosx)/(1+cosx)))` जब `0ltxltpi`.

Answer

दिया हुआ व्यंजक `=tan^(-1)(sqrt((2sin^(2)""(x)/(2))/(2cos^(2)""(x)/(2))))=tan^(-1)(tan""(x)/(2))=(x)/(2)," "("":'0lt(x)/(2)lt(pi)/(2))`