solve the equation on interval 02 tan1cos10 Solve the equati
 solve the equation on interval 0<_>2.
 (tan+1)(cos+1)=0
Solution
(tanx +1)(cosx+1) =0
given 0<=x < 2pi
tanx = -1
x = tan^-1(-1)
= pi -pi/4 , 2pi -pi/4
= 3pi/4 , 7pi/4
cosx =-1
x = cos^-1(-1)
= pi
Solution set : ( 3pi/4 , 7pi/4 , pi)

