2tanx/1-tan^2x = 2/cotx-tanx
csc^2x/cox^2x = sec^2x + csc^2
(sinx+cosx)(tanx+cotx) = secx+cscx
and
1-sinx/1+sinx = (secx - tanx)^2
Thanks alot
2tanx/1-tan^2x = 2/cotx-tanx
2tanx/1-tan^2x = tan2x = sin2x/cos2x
= 2sinx*cosx/ (cos^2x - sin^2x). Divide numerator and denomenator by sinx*cosx, you get
= 2/(cotx - tanx)
csc^2x/cox^2x = sec^2x + csc^2
sec^2x + csc^2
= 1/cos^2x + 1/sin^2x
= (sin^2x + cos^2x)/ sin^2x*cos^2x
= 1/(sin^2x*cos^2x)
= csc^2x/cos^2x
Hello cannonI was picking up on the reply by sa-ri-ga-ma:
and your query As far as your next post is concerned:this thread is now too complicated! Please have another attempt at these questions - they are very similar to the ones we've shown you already. If you still can't do them, re-post them and show us your attempts in a new thread. (See Rule #14).
Grandad