help plzz

Asked by vt2008 | 19th Sep, 2010, 05:09: PM

Expert Answer:

LHS
= Tan(69+66)... using the formula for tan(A+B)
=Tan (135)
=tan (180-45)
= tan (-45)...as pie is the period of tan function
=-1

Answered by  | 19th Sep, 2010, 09:37: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.