huneya
find the exact value of the indicated trigonometric function of theta
cosθ=4/7,tanθ<0
fin sin theta



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rizwan_uet
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dw:1360331199543:dw

ParthKohli
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@Opcode

mathsmind
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you find the lengths of the triangle using pyth. theorem

mathsmind
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then use the principle of sin(theta)=opp/hype, and tan(theta)= sin.cos or =opp/dj

huneya
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dw:1360331698436:dw

mathsmind
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tan(theta)=sin(theta)/cos(theta)

huneya
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cos is adj/hype

rizwan_uet
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but here tan theta is not less than 0(zero)

mathsmind
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yes exactly @huneya

mathsmind
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sin(theta)=opp/hype

mathsmind
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tan(theta)=opp/adj

rizwan_uet
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recheck your question

mathsmind
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yes @rizwan has a point tan(theta) is not less than zero

mathsmind
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that condition confused me as well

mathsmind
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or its an error by the book or ur teacher

mathsmind
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you can use another method to solve this

mathsmind
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\[\sin^2(\theta) = 1  \cos^2(\theta)\]

mathsmind
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=1(4/7)^2