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exact value using double angles - please help
find the exact value of sin 67.5 degrees using sin 2 x. I'm having trouble with this one, because after a certain point i have no idea what to do.. my attempt: sin 2(67.5)=2sin(67.5)cos(67.5) sin 135 = 2sin(67.5)cos(67.5) 1/√2 = 2sin(67.5)cos(67.5) and i have no idea what to do...- boogaaaaa
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- Replies: 4
- Forum: Mathematics Extension 1
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