prove that

Asked by haynes | 8th Apr, 2009, 07:52: PM

Expert Answer:

L.H.S.=sin2A + cosec2A + 2sinA cosecA + cos2A + sec2A + 2cosA cosecA

now use sin2A + cos2A=1 and cosec2A=1+cot2A and sec2A=1+tan2A

we get

=1+2+2+(1+cot2A ) + ( 1+tan2A)

=7+tan2A+cot2A

Answered by  | 9th Apr, 2009, 01:28: AM

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