Question

cos105 cos75 - sin105 sin75

Answer 1

this is simple. just calculate it as is, on the graphing calculator, and hit equal. thats the answer

Answer 2

i have to do it out by hand

Answer 3

you would need a table to do it by hand

Answer 4

oh! right! the z table right? well, you cant do it by hand, just wanted to let you know that. but you dont know how to use the z chart?

Answer 5

what about sin 75 cos 75