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27 mar 2022 · In general, if a negative angle has a reference angle of \(30^{\circ}\), \(45^{\circ}\), or \(60^{\circ}\), or if it is a quadrantal angle, we can find its ordered pair, and so we can determine the values of any of the trig functions of the angle.
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Trigonometric Functions of Negative Angles. Recall that graphing a negative angle means rotating clockwise. The graph below shows − 30 ∘. Notice that this angle is coterminal with 330 ∘. So the ordered pair is (√3 2, − 1 2). We can use this ordered pair to find the values of any of the trig functions of − 30 ∘. For example, cos(− 30 ∘) = x = √3 2.
This trigonometry calculator will help you in two popular cases when trigonometry is needed. If you want to find the values of sine, cosine, tangent, and their reciprocal functions, use the first part of the calculator.
Free math problem solver answers your trigonometry homework questions with step-by-step explanations.
Trigonometric Tables https://math.tools 21 0.36667 0.35851 0.93353 0.38404 1.0712 2.78932 2.60392 22 0.38413 0.37475 0.92712 0.40421 1.07861 2.66845 2.47397
2 maj 2021 · This table contains values for sine, cosine and tangent for angles between 0 and 90º. All values are rounded to four decimal places. Click the image for the full-sized image or download the PDF version. The downloadable trig table PDF is optimized to fit on a single 8½ x 11″ sheet of paper.
Course: Precalculus > Unit 2. Lesson 5: Law of cosines. Solving for a side with the law of cosines. Solving for an angle with the law of cosines. Solve triangles using the law of cosines. Proof of the law of cosines.
