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

19647 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Why is the definite integral between negative limits of a function with positive values negative even though the area bound by the x-axis is positive? for example the integral of y=x^2 between x=-2 and x=-1


Find all possible values of θ for tan θ = 2 sin θ with the range 0◦ ≤ θ ≤ 360◦


Find the gradient of the exponential curve y(x)=(9e^(7x))/(12e^(2x)) at x=2/5


Find the tangent to the curve y=x^3+3 at the point x=1.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences