Question

please give me a full explanation ​

Answer 1

Step-by-step explanation:

costea ×sin a/cos a +1/ cos a +cos a × sinat /cos a -1/cos a

sin A+1/cosa + sin a-1/cosA

2 sina/Cos a

2 tan a

Answer 2

Step-by-step explanation:

Refer the above image, cheers!