The angle of depression from a bird sitting on top of a telephone pole to the base of a tree is 63 degrees if the telephone pole is 18 feet tall, what is the distance between the pole and the tree

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

*segment an is an altitude of right ? abc with a right angle at a. if ab = 2root 5 in and nc = 1 in, find bn, an, ac.