Question: Assume that 0 < /2. 19. Find sin and tan if cos = 5/13. 21. Find sin , sec ,

Assume that 0 ≤ θ < π/2.
19. Find sin θ and tan θ if cos θ = 5/13.
21. Find sin θ, sec θ, and cot θ if tan θ = 2/7.
23. Find cos 2θ if sinθ = 1/5.

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