mstoffield1349 mstoffield1349

17-03-2018
Mathematics

contestada

Find the exact value of sin(x+y) when sinx=-1/4 and cosy=-3/5 in q2

Respuesta :

Аноним Аноним

17-03-2018

sin (x + y) = sin x cos y + sin y cos x

sin y = -4/5 and cos x = -sqrt255

so sin(x + y) = -1/4 * -3/5 + -4/5 * sqrt255
= 3/20 - 4 sqrt255/5
= (3 - 16 sqrt255) / 20 answer

Answer Link

Otras preguntas

Why is it important never to change a subscript?

Is the following sentence true or false? In the troposphere, the temperature increases as the altitude increases.

This is the act of writing down the required information you get from a laboratory experiment.

Which revision most effectively corrects the faulty coordination in this sentence? The Internet has changed communications, and it allows computer networks to

Kori bought 56 boxes of tiles from the home improvement store, which wasstore have?4/7 of the total number of boxes that they had. How many boxes of tiles did t

DAY 3 PLEASEEEEE HELPPPPPP

Two-fifths of the 65 pies at the bakery are apple pies. How many apple pies does the bakery have?

Radar helped the british won the battle of britain explain why it made such a difference

Assume you are rolling two dice , the first one is red, and the second one is green . Use a systematic listing to determine the number of ways you can roll a to

There are 1,348 trays of food at the royal ball. If the trays of food are spread out evenly onto 8 different tables, how many trays of food will there be on eac