SOLUTION: Assume θ is an angle in the first quadrant, and sin(θ) = 5/7 Find cos(θ) Find cos(2θ)

SOLUTION: Assume θ is an angle in the first quadrant, and sin(θ) = 5/7 Find cos(θ) Find cos(2θ)

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Question 963370: Assume θ is an angle in the first quadrant, and
sin(θ) = 5/7
Find cos(θ)

Find cos(2θ)
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Since it's in the first quadrant,

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