# Trigonometry

#1
Expressing in terms of ratios of acute angles
0
3 months ago
#2
Expressing in terms of ratios of acute angles
I think you've missed out some information if you want help on a problem
0
#3
sin 205
0
3 months ago
#4
sin 205
Are you familiar with the graph of y = sin x? Do you know some periodicity properties of the sine function or some formulae like sin(180 - x) = sin x?

Alternatively think about how the sine and cosine functions relate to the x and y coordinates of a point moving round the unit circle - where would you plot a point that has rotated through 205 degrees from the positive x-axis, and how could you construct a related similar triangle for a point in the 1st quadrant?
,
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

Yes (38)
70.37%
No (12)
22.22%
I didn't use it to prepare (4)
7.41%