Plzzz solve 72 and 75
Attachments:
Answers
Answered by
1
72){ tan A / ( sec^2 A )^2 } + { cot A / ( cosec^2 A )^2 }
= { ( sin A / cos A ) * cos^4 A } + { ( cos A / sin A ) * sin ^4 A }
= { sin A * cos^3 A } + { cos A * sin ^3 A }
= sin A * cos A { cos^2 A + sin ^2 A }
= sin A * cos A
= R.H.S.
= { ( sin A / cos A ) * cos^4 A } + { ( cos A / sin A ) * sin ^4 A }
= { sin A * cos^3 A } + { cos A * sin ^3 A }
= sin A * cos A { cos^2 A + sin ^2 A }
= sin A * cos A
= R.H.S.
Similar questions