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Magazine Problem 2
WRITING Explain how you know the tangent ratio is constant for a given angle measure.
Problem 3
In Exercises \(3-6,\) determine which of the two acute angles has the given trigonometric ratio. (See Example \(1 .\) ) The cosine of the angle is \(\frac{4}{5}\)
Problem 3
In Exercises 3鈥�8, use a calculator to \(\square\)nd the trigonometric ratio. Round your answer to four decimal places. (See Example 1.) $$\sin 127^{\circ}$$
Problem 4
In Exercises 3鈥�8, use a calculator to \(\square\)nd the trigonometric ratio. Round your answer to four decimal places. (See Example 1.) $$\sin 98^{\circ}$$
Problem 5
In Exercises \(3-6,\) determine which of the two acute angles has the given trigonometric ratio. (See Example \(1 .\) ) The sine of the angle is 0.96.
Problem 5
In Exercises 3鈥�8, use a calculator to \(\square\)nd the trigonometric ratio. Round your answer to four decimal places. (See Example 1.) $$\cos 139^{\circ}$$
Problem 6
In Exercises 3鈥�8, use a calculator to \(\square\)nd the trigonometric ratio. Round your answer to four decimal places. (See Example 1.) $$\cos 108^{\circ}$$
Problem 6
In Exercises \(3-6,\) determine which of the two acute angles has the given trigonometric ratio. (See Example \(1 .\) ) The tangent of the angle is \(1.5 .\)
Problem 7
In Exercises 3鈥�8, use a calculator to \(\square\)nd the trigonometric ratio. Round your answer to four decimal places. (See Example 1.) $$\tan 165^{\circ}$$
Problem 7
In Exercises \(7-12,\) let \(\angle \mathrm{D}\) be an acute angle. Use a calculator to approximate the measure of \(\angle \mathrm{D}\) to the nearest tenth of a degree. (See Example \(2 . )\) $$\sin D=0.75$$
