Need help QUICKLYY ———————————————————

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Ihonestly have no clue if it's each or none.

Multiply and simplify. (x - 4) (x^2 – 5x – 6) i will mark brainliest if your answer is right. show how you got the answer. if your answer is correct but does not show how you got the answer you will not be marked brainliest.