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wen_21

  • one year ago

find all values of x in the interval [0,2pi] that satisfy the equation 7sin(2X)=7cos(x)

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  1. cwrw238
    • one year ago
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    use the identity sin(2x) = 2 sin(x)cos(x): so 7*2sin(x)cos)x - 7cos(x) = 0 now factior the LHS as the next step to solving

  2. cwrw238
    • one year ago
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    hint: divide through by 7 as well

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