The Total solution for NCERT class 6-12
Solve:
┬а
4 sin-1x =┬а╬а┬а- cos-1x
4sin-1x+cos-1x=╬а
3sin-1x+sin-1x+cos-1x=╬а
3sin-1x=╬а/2┬а[sin-1x+cos-1x=╬а/2]
sin-1x=╬а/6
x =┬аsin╬а/6=0.5