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3sin²A - 2sinA - 5. |
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Answer» Step-by-step EXPLANATION: this is in quadratic EQUATION in term of sinA if sinA=x then 3x^2-2x-5=0 FORMULA for quadratic equation is -b+-sqrt(b^2-4ac)/2a 2+-sqrt(4-4(3)(-5)/2×3 2+-sqrt(4+60)/6 2+-8/6 2+8/6 and 2-8/6 5/3 and -1 |
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