What is #(cot2theta)/3# in terms of #tantheta#? Trigonometry Trigonometric Identities and Equations Fundamental Identities 1 Answer Nghi N May 12, 2018 #(1 - tan^2 t)/(6tan t)# Explanation: Trig identity: #tan 2t = (2tan t)/(1 - tan^2 t)# Take the inverse --> #cot 2t = 1/(tan 2t) = (1 - tan^2 t)/(2tan t)# #(cot 2t)/3 = (1 - tan^2 t)/(6tan t)# Answer link Related questions How do you use the fundamental trigonometric identities to determine the simplified form of the... How do you apply the fundamental identities to values of #theta# and show that they are true? How do you use the fundamental identities to prove other identities? What are even and odd functions? Is sine, cosine, tangent functions odd or even? How do you simplify #sec xcos (frac{\pi}{2} - x )#? If #csc z = \frac{17}{8}# and #cos z= - \frac{15}{17}#, then how do you find #cot z#? How do you simplify #\frac{\sin^4 \theta - \cos^4 \theta}{\sin^2 \theta - \cos^2 \theta} # using... How do you prove that tangent is an odd function? How do you prove that #sec(pi/3)tan(pi/3)=2sqrt(3)#? See all questions in Fundamental Identities Impact of this question 1884 views around the world You can reuse this answer Creative Commons License