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If x is an acute angle and tan x = 3/4

Evaluate : cos x - sin x
cos x + sin x

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3 answers
  1. tanx = 3/4
    draw the triangle, and you can see that the hypotenuse is 5, so
    sinx = 3/5
    cosx = 4/5
    Now just use those values in your expression.

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    oobleck
  2. Word~bard

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  3. Help me to work it out

    I don't understand

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