Question

a) Find all exact solutions on (0,21) of 8 sin²x + 6 sinx + 1 = 0. b) Fine all exact solutions on (0,21) of sin’x - cos²x = 0
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Answer #1

we have sinu-cosno COX2x = 0 20 = ha for nez 2 АЛ 4. for net Restricting our values to the internal [0,28] giuy our final res

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