#trigonometric equations

28 messages · Page 1 of 1 (latest)

frigid fjord
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you divide the sine over to the RHS and then you can either do arccot(√3) or arctan(1/√3)

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which is 30 degrees, and then you can work out the rest of the solutions

vivid rune
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i dont understand the first part. what do i type into the calculator

frigid fjord
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tan^(-1)(1/√3)

vivid rune
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that came up as -15√3

frigid fjord
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what

vivid rune
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oh iunder stand it

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i just dont under stand how you got it

frigid fjord
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you have sinx/cosx=1/√3

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so tanx=1/√3

vivid rune
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ok

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so part b would be tan^(-1)(2)

frigid fjord
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b would be sinx=-cosx
-sinx/cosx=1

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-tanx=1
tanx=-1

vivid rune
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ok

frigid fjord
vivid rune
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i know how to do the basic but its the making it into a tan that confuses me

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i just havnt been taught it

frigid fjord
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sinx/cosx=tanx

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try and get it into that form

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with a sinx/cosx

vivid rune
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so c would be tan(-1)(4/3)

frigid fjord
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no

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3/4

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nvm

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4/3 is correct

vivid rune
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ok

frigid fjord
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I can't read sideways