Trigonometry Summary

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  • sine of an angle = cosine of its complement. If sin A = cos B, then A + B = 90o.
  • Trigonometric ratios of standard angles
(i) sin 0o = 0, cos 0o = 1, tan 0o = 0

(ii)

(iii)

(iv)

(v) sin 90o = 1 cos 90o = 0 tan 90o =


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