Answer:

Step-by-step explanation:
cos O = adjacent / hypotenuse
cos O = 12/13
I hope I helped you^_^
Answer:
See picture:)
Hope that makes sense! If you'd like any more help with maths, I'd be happy to offer online tuition. You can find me at: www.birchwoodtutors.com
Answer:
find using calculator:)
Step-by-step explanation:
pie X (25 divided by 2) X (25 divided by 2) = answer
Your answer is -2 1/12. :)