3 years ago

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

Mathematics

1 answer:

Tom [10]3 years ago

3 0

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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