Dear student
Since you have not mentioned question number so doing as per my understanding.
Kindly refer the link for your first query.
https://www.meritnation.com/ask-answer/question/prove-that-tan2a-sin2a-tan2a-sin2a/introduction-to-trigonometry/3035918
For remaining queries we request you to post them in separate threads to have rapid assistance from our experts.
Regards
Since you have not mentioned question number so doing as per my understanding.
Kindly refer the link for your first query.
https://www.meritnation.com/ask-answer/question/prove-that-tan2a-sin2a-tan2a-sin2a/introduction-to-trigonometry/3035918
For remaining queries we request you to post them in separate threads to have rapid assistance from our experts.
Regards