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anonymous
 one year ago
Please teach me the steps to solve this problem
Suppose sin Alpha= 4/5, 0<Alpha<pie/2 and sin beta = 5/13, pie/2<beta<pie
Find the exact value of
sin 2Alpha
sin(alphabeta)
anonymous
 one year ago
Please teach me the steps to solve this problem Suppose sin Alpha= 4/5, 0<Alpha<pie/2 and sin beta = 5/13, pie/2<beta<pie Find the exact value of sin 2Alpha sin(alphabeta)

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freckles
 one year ago
Best ResponseYou've already chosen the best response.1do you remember the double angle identity for sine? \[\sin(2 \alpha)=2 \sin(\alpha)\cos(\alpha)\] also draw a right triangle in the appropriate quadrant. dw:1436817504152:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.1find the adjacent side

freckles
 one year ago
Best ResponseYou've already chosen the best response.1you want to find the adjacent side so you find cos(alpha)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02516=sqr9=3 so 2(4/5)(3/5)?
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