Hi please help! Please and thank you

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

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

The function models the number of accidents per 50 million miles driven as a function