WebOct 19, 2024 · cos theta = 3/5, theta in quadrant IV WebAug 22, 2015 · Remember that cos θ is just the x -coordinate of a point at angle θ on the unit circle. Knowing that cos θ = − 4 5 and that θ is in the third quadrant, you should be able to make a rough sketch of that point. – David K Aug 22, 2015 at 2:43 Add a comment 1 Answer Sorted by: 5 This is a table that expresses sin, cos and tan in terms of each other.
Given: cos(2theta)=3/5 find sin(theta)? Socratic
WebSolve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. WebAug 4, 2024 · If θ is in the fourth quadrant, then sinθ = − 5 13 cosθ = 12 13 tanθ = − 5 12 Therefore, sin2θ = 2sinθcosθ = 2 × − 5 13 × 12 13 = − 120 169 cos2θ = cos2θ − sin2θ = (12 13)2 − ( − 5 13)2 = 144 169 − 25 169 = 119 169 Answer link A. S. Adikesavan Aug 4, 2024 sin2θ = 120 169,θ ∈ Q1 and − 120 169,θ ∈ Q4. cos2θ = 119 169 Explanation: See my … microsoft teams subteam
trigonometry - Efficiently finding $\theta$ such that $\cos\theta ...
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