Prove :cosx-cosy= -2sin(x+y/2)sin(x-y/2)

Prove: 2cot-2tanx= 4-2sec^2x / tanx

1 answer

2Sinx
Similar Questions
    1. answers icon 2 answers
  1. Prove the following identity:1/tanx + tanx = 1/sinxcosx I can't seem to prove it. This is my work, I must've made a mistake
    1. answers icon 1 answer
  2. Q.1 Prove the following identities:-(i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 1-2sin^x cos^x/sinx cosx (ii)
    1. answers icon 0 answers
  3. Q.1 Prove the following identities:-(i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 1-2sin^x cos^x/sinx cosx (ii)
    1. answers icon 1 answer
more similar questions