Exact ratios from cosecant with positive tangent

Exact ratios from cosecant with positive tangent

IB Year 6 | Grade 12

Given that \(\operatorname{cosec} x=-\dfrac{25}{7}\) and that \(\tan x\) is positive, find the exact value of each of the following.

  1. \(\cos x\)
  2. \(\tan x\)
  3. \(\sec(-x)\)
  4. \(\sin(180{}^\circ-x)\)

Solution:

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Answer:(a) \(-\frac{24}{25}\) (b) \(\frac{7}{24}\) (c) \(-\frac{25}{24}\) (d) \(-\frac{7}{25}\)

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