energysclothing energysclothing
  • 03-05-2019
  • Mathematics
contestada

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

Respuesta :

altavistard
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

Do y’all guy know this please helppppp
What group wanted to severely punish the South for causing the Civil war?
heeeelppppppppppppp me plsssssssss
Evaluate each expression.6! =3! x 2! =6!/3! =
Find the volume of the triangular prism, given the area of the base is 14 cm2 and the height of the prism is 15 cm.
Completa la lista de la Señora Muñoz. Recuerda usar las siguientes palabras: tajadas, kilo, botellas, lata, paquetes, frasco. LISTA DE COMPRAS Un ______________
tcah the world today
What was the main mountain pass wagon trains. Used by native Americans
When did the digital revolution begin?
hello hope you are well can I have some help on this factorise question please 4f2 + f the 2 is a squared