I was wondering if anyone can help which this question in C3. It would be much appreciated!
cosxsinx (cotx +tanx)
The book says it equals one but how?
C3 Maths Trig Help Watch
- Thread Starter
- 23-12-2010 15:35
- 23-12-2010 16:49
Write cotx and tanx in terms of sinx and cosx, then multiply out the brackets.