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anonymous
 one year ago
find the exact value for cot(11pi/12)
anonymous
 one year ago
find the exact value for cot(11pi/12)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0use the inverse of tan(a+b) equation

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@welshfella @nincompoop

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1i think you can ise the half angle formula tan (x/2 = sin x  1 + cos x i'll just check if i got that right

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1dw:1437930509023:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1form the diagram we see that sin 11pi/6 = 1/2 and cos = sqrt3/2

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1then having found the tan just invert to get the cot

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1so plug in sin x = 1/2 and cos x = sqrt3/2 in the formula to get tan (11pi/12)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1tan (11pi/12) = 1/2  1 + sqrt3/2

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1simplyfing we get  1  2 + sqrt3 now invert this to get cot(11pi/12)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yay thank you so much
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