Trigometric Functions help! (1 Viewer)

[SGSII]

Hi guys
Could someone please help me solve part a) of this question:

Thank you!

 

[Kurosaki]

Hi, it's an isosceles triangle since the two radii are equal. Use sine rule to work out the radius and u should be sweet.

 

[Kurosaki]

Another method:

length of arc = radius x angle (in radians)

Convert 45 degrees into radians, just multiply 45 by and it is

Sub given information in the formula,

That's for arc length not chord

 

[SGSII]

Hi, it's an isosceles triangle since the two radii are equal. Use sine rule to work out the radius and u should be sweet.

Haha thanks!
Had a mental block and didn't see it lol