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given that tan(θ)=√7/2 and sin(θ) < 0, find cos(θ)

Given That Tanθ72 And Sinθ Lt 0 Find Cosθ class=

Answer :

square tan theta

(tan^2) + 1 = sec^2

so sec^2 = 11/4

sec = - (sqrt 11)/2

cos= - 2/ (sqrt 11)

answer choice a if you simplify

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