The Student Room Group
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>

trigonometry help

I'm so stuck on q4c image-3c484056-1579-4309-ba46-31e33661a7ce637305151-compressed.jpg.jpeg
Reply 1
Avatar for AddQ7
AddQ7
9
Find area of the triangle then subtract the area of the three sectors inside of it.

As you probably know:

Area of sector (in radians) = 0.5×r2×θ0.5\times r^{2}\times \theta
Reply 2
Avatar for Mosa99
Mosa99
15
For part 4-c you gotta find the total area of the triangle first after that you gotta find the area of the sector in each of the three circles (area of arc=0.5theta r^2). The shaded area is the sum of areas of sectors subtracted from the area of the triangle ABC.
(edited 6 years ago)
Is this GCSE or AS level?
Reply 4
Avatar for AddQ7
AddQ7
9
Original post by Y11_Maths
Is this GCSE or AS level?

AS or A-level
Since angles are measured in radians instead of degrees.
thank you so much
somehow I'm still getting it wrong, what's wrong with my working?image-19299e79-0887-4217-b2ed-4891200506ff26552505-compressed.jpg.jpeg
Looks like a rounding error on angle B.
Original post by old_engineer
Looks like a rounding error on angle B.


Thank you so much!😀

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you