energysclothing energysclothing

03-05-2019
Mathematics

contestada

how to find the cosine of 81 in terms of sine?

Respuesta :

altavistard altavistard

03-05-2019

Answer:

Step-by-step explanation:

The cosine of angle Ф is √(1 - sin²Ф), which is positive if our angle 81 degrees is in Quadrant I.

sin 81° = 0.9877, so (sin 81°)² = 0.9755, and

cos 81° = 1 - 0.9755 = 0.0245

Answer Link

Otras preguntas

Sean read 1/5 of a book in 1 1/2 hours. How long will it take Sean to read 1/2 of this book? Enter your answer as a mixed number in simplest form in the box.

The length of a living room is 12 feet and its width is 1012 feet. The length of the room is being expanded by x feet. Choose an expression to represent the new

Sugar, starch, and fiber belong to which family of nutrients

After the American Revolution, life for American colonists changed because they no longer had to follow the laws of the English king. The underlined word in

Which is an example of an element? a.salt (nacl) b.water (h20) c.silver (ag) d.electron (e-) hint?

The point where the two sides of an angle meet, or where the edges of a three-dimensional intersect.

160 bananas; 20% increase

Definition:This was the series of organized terrorist attacks on the United States by Al Qaeda by suicide commercial plane crashes in New York City, Arlington

Find the equation of a line that is parallel to the line y=7 and contains the point (1,-3)

In an electrical circuit, the voltage across a resistor is directly proportional to the current (amps) running through the resistor. If a current of 12 amps pro