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Hard trig question. Please Please help!
if θ is an acute angle and cos θ = 4/5 . use the result cos^2 θ = (1 + cos2x) / 2 . Find the exact value of cos (θ/2)
 11 months ago
 11 months ago
Hard trig question. Please Please help! if θ is an acute angle and cos θ = 4/5 . use the result cos^2 θ = (1 + cos2x) / 2 . Find the exact value of cos (θ/2)
 11 months ago
 11 months ago

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AonZBest ResponseYou've already chosen the best response.1
@phi @primeralph @ganeshie8
 11 months ago

primeralphBest ResponseYou've already chosen the best response.2
dw:1368828851468:dw
 11 months ago

primeralphBest ResponseYou've already chosen the best response.2
dw:1368828916634:dw
 11 months ago

primeralphBest ResponseYou've already chosen the best response.2
dw:1368828952238:dw
 11 months ago

AonZBest ResponseYou've already chosen the best response.1
isnt cosA = 4/5? not cos2A?
 11 months ago

primeralphBest ResponseYou've already chosen the best response.2
no, I changed theta = 2A, so costheta = cos2A
 11 months ago

AonZBest ResponseYou've already chosen the best response.1
oh :P didnt know you could do that! Thanks so much!!!
 11 months ago
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