Asked by Ryland

Find the exact value of each of the following using reference angles.

a)sin 225degrees

b) cot 120degrees


Answered by Reiny
sin 225 ---- third quad , sine is +
= -sin45 ---- 225-180 = 45
= -1/√2 or -√2/2

cot 120 ---- quad II, tan and cot are -
= -cot 60 ---- 180-120 = 60
= -1/√3 or -√3/3
There are no AI answers yet. The ability to request AI answers is coming soon!