Prove that 2cot2x+tanx=cotx

2cot2x= 2(1/tan2x)= 2(1/(2tanx/1-tan2x))=2(1-tan2x)/2tanx= (1-tan2x)/tanx(1-tan2x)/tanx +tanx=(1-tan2x)/tanx +tan2x/tanx=1/tanx=cotx

AD
Answered by Alisa D. Maths tutor

21410 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Let f(x) = 2x^3 + x^2 - 5x + c. Given that f(1) = 0 find the values of c.


Differentiate x^2 + y^2 with respect to x


How to expand squared brackets?


Why do we need the constant of integration?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning