Given tan(A)=-5/7 and sin(A) less than 0, Find sin(A) and cos(A)

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This video explains how to find sine and cosin3 function values given the tangent function value and that sine is positive.
  1. Mathispower4u
  2. trigonometry
  3. trig
  4. function
  5. value
  6. sine
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This is a really good explanation! Some other videos make a mistake of labelling the angle in the triangle as A, instead of A^ref, or does not mention +/- when taking square root. Good editing as well, keeping the values of x, y, r while simply erasing the work from the previous part.

probaye
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Can tell me the answer I didn’t really under stand it

ethanbramer