johnonam
johnonam johnonam
  • 03-09-2017
  • Mathematics
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Solve (1-sin(x))(1+sin(x))

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coolstick
coolstick coolstick
  • 03-09-2017
Since these are conjugates (a conjugate is when we have anything a - anything b multiplied by anything a + anything b for the most part - this excludes things such as infinity) Since sin(x) and 1 both fit under 'anything', we have a special way of multiplying these - it's a^2-b^2, or
1^2-sin^2x=1-sin^2x=cos^2x using trigonometric properties
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