Question

URGENT HELP PLEASE SOLVE QUESTIONS FIVE AND SIX USING THE INSTRUCTIONS IN THE PIC VERY URGENT PLEASE HELP ME!!!!!!

Answer 1

4. First one would be useful

5. Second one would be useful

Explanation:

4. cosø × cosø × tanø = sinø × cosø

cosø × cosø × sinø/cosø = sinø × cosø

cosø × sinø = sinø × cosø

5. 1-sin²ø/1-sin²ø = 1