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Trig Help

Forums: Math, Trig
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Netzer7
 
Reply Tue 4 Jun, 2019 05:54 pm
Use a double-angle or half angle identity to find the exact value
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Type: Question • Score: 0 • Views: 3,460 • Replies: 2
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McGentrix
 
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Reply Tue 4 Jun, 2019 10:49 pm
@Netzer7,
SOH CAH TOA

That oughta do it.
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fresco
 
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Reply Fri 14 Jun, 2019 06:40 am
@Netzer7,
Both of those questions involve pythagoras triangles (7 24 25) (3 4 5) thereby yielding all six trig ratios for each triangle.
It should therefore be pretty obvious what the required numbers are to insert into the half angle formlae.
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