Problem

Find sinθ.
secθ=136,tanθ<0
sinθ=
(Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

Answer

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Answer

Final Answer: sinθ=115130

Steps

Step 1 :We know that secθ=1cosθ, so cosθ=1secθ=613.

Step 2 :We also know that sin2θ+cos2θ=1, so we can solve for sinθ by rearranging this equation to get sinθ=1cos2θ.

Step 3 :However, we also know that tanθ<0, which means that sinθ and cosθ must have opposite signs. Since cosθ>0, sinθ must be negative.

Step 4 :Therefore, sinθ=1cos2θ.

Step 5 :Final Answer: sinθ=115130

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