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Let α,β be such that π < α−β < 3π. If sin α+sin β=−2165 and cos α+cosβ=−2765, then the value of cos α−β2is |
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Answer» Let α,β be such that π < α−β < 3π. If sin α+sin β=−2165 and cos α+cosβ=−2765, then the value of cos α−β2is |
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