anonymous
  • anonymous
prove that cos4A = cosec4A - tan2A
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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experimentX
  • experimentX
I don't think it is right
anonymous
  • anonymous
cuz if u try to type the value of cos4 A in ur calculator, u will get different answer by typing cosec4A - tan2A in ur calculator
experimentX
  • experimentX
let's see ...i might be wrong

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phi
  • phi
right hand side is cot(4A)
experimentX
  • experimentX
put any arbitrary value pi/4 the r.h.s => cos pi = -1 on the right hand side you have csc pi = inf which is untrue you must be putting particular value of A (solution), check every value ... the points where it intersects, the above must be true for all values of A http://www.wolframalpha.com/input/?i=cos4A+%3D+cosec4A+-+tan2A

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