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i need step by step solving in pre calculus 12 format , i have to show work, it's for my pre calculus class 2 Which

i need step by step solving in pre calculus 12 format , i have to show work, it's for my pre calculus class

2 Which expression is equivalent to (sin2 0 cos? 9) sin20 ? A. 2sin20 B. 2sin20 C. cos40 D. cos4@

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