(" vil ")(sin alpha+cosec alpha)^(2)+(cos alpha+sec alpha)^(2)=tan^(2)alpha+cot^(2)alpha+7

(sin alpha+cos ec alpha)^(2)+(cos alpha+sec alpha)^(2)=tan^(2)alpha+cot^(2)alpha+7

(sin alpha+csc alpha)^(2)+(cos alpha+sec alpha)^(2)-7=

If (sin alpha + "cosec" alpha )^(2) + ( cos alpha + sec alpha )^(2)=k+ tan^(2) alpha + cot^(2) alpha then k=

If (sinalpha+"cosec"alpha)^(2)+(cosalpha+secalpha)^(2)=k+tan^(2)alpha+cot^(2)alpha then the value of k is

Prove that, (sin alpha + cos alpha)/(cos alpha-sin alpha)=tan2 alpha + sec 2 alpha

sin 2 alpha - cos 2 alpha tan alpha =

(sin alpha)/(1+cos alpha)+(1+cos alpha)/(sin alpha)=2cosec alpha

( tan alpha + " cosec " beta )^(2) - ( cot beta - sec alpha )^(2) =

(tan alpha+cos ec beta)^(2)-(cot beta-sec alpha)^(2)=2tan alpha cot beta(cos ec alpha+sec beta)