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Find a possible solution to the equation sin(3x+13)=cos(4x). A. x=-13 degrees B. x=0 degrees C. x=11 degrees D. x-13 degrees
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just replace x in the equation by the values of x in the options and see which one fots
* fits
hint: cos(4x) = sin(90 - 4x)
still dont get it
sin(3x+13)=cos(4x) sin(3x+13)=sin(90 - 4x) this implies 3x + 13 = 90 - 4x solve for x
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x=11
right
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