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Find the value of in each triangle.

  1. Triangle, labeled as follows: right side, x, left side, 21, top side, 15, top right angle, 40 degrees.

    Use the Law of Cosines.

  1. Triangle labeled as follows: left side, x, top side, 33, top left angle, 40 degrees, bottom angle, 26 degrees.

    Find the last angle, then use the Law of Sines.