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Mathematics 13 Online
OpenStudy (anonymous):

Please help! I need help with the problem attached

OpenStudy (anonymous):

OpenStudy (anonymous):

at first do you the formula of cosA in terms of sinA/2

OpenStudy (anonymous):

Use: \[\large \sin^2(\frac{A}{2}) = 1 - \cos^2(\frac{A}{2})\]

OpenStudy (anonymous):

@waterineyes I think cosA is given not cosA/2

OpenStudy (anonymous):

use this one:|dw:1343644435832:dw|

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