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

6311 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A cone has radius 6cm and height 5cm. Work out its volume in terms of pi. (Formula for the volume of a cone is V=(1/3)pi(r)^2h)


5x-7 = 3x + 3, solve x


(2x-5)(3x+2)(x+7) - Expand the brackets.


I set up a tent (assume it’s a regular triangular prism) of length 2.2m. The triangular face of the tent is an isosceles triangle. The two identical sides are both 1.4m long and have an angle of 34degrees between them. Work out the volume of the tent -3sf


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences