In triangle XYZ: XZ = 10 cm; YZ = 8 cm; cos Z = 1/8. Calculate the length of XY.

We can use the cosine rule to determine the lenght of XY.
XY2 = 102+82-2108cos ZXY2 = 100+64-180(1/8) = 144XY = 12

VH
Answered by Vencel H. Maths tutor

6133 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

What is the expansion of (x + 4)(x - 5) ?


find the roots of this following equation: 2x^2+18x+36


How would I expand 3 brackets, e.g. (x + 3)(x + 4)(x + 2)?


You are asked to choose from the meal deal at school, there are 9 varieties of sandwich, 6 varieties of snack and 8 varieties of drink. The meal deal consists of a sandwich, snack and drink - how many different combinations of meal deal are there?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences