Question

Please ans this question pleaseee​

Answer 1

`{ \tt{ \tan {}^(4) \theta + { \sec }^(2) \theta }} \\ { \tt{ = ({ \tan }^(2) \theta ){}^(2) + { \sec }^(2) \theta }} \\ = { \tt{ {-(1 - { \sec }^(2) \theta) }^(2) + { \sec }^(2) \theta }} \\ { \tt{ = -(1 - 2 { \sec }^(2) \theta + { \sec }^(4) \theta) + { \sec}^(2) \theta}} \\ { \tt{ = -(1 - { \sec }^(2) \theta) + { \sec }^(4) \theta}} \\ { \tt{ = -{ \tan}^(2) \theta + { \sec }^(4) \theta }} \\ = { \tt{ { \sec}^(4) \theta - { \tan }^(2) \theta}} \\ { \bf{hence \: proved}}`