Use your identity to write the numerator in terms of tangent.
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It isn't clear what you mean with "by". Are you multiplying 1 by secx, or perhaps dividing? Also, is the multiplication (or division) only by sec x, or by the sum of secx + cos x?
-x-6-(-11x) + (-1) Remove the brackets: -x-6+11x-1 Collect and simplify like terms: 10x-7 A - - is equal to a +
8 plus 4 minus 12 divided by 1 is 0.
2c
x = 1 1/2 = [14 dividedby (6x - 2) ] - [6 dividedby (3x - 1) ]