Kangsandeep826 Kangsandeep826
  • 03-04-2017
  • Mathematics
contestada

Find the exact value of arccos(-sqrt2/2)

Respuesta :

sdmatera
sdmatera sdmatera
  • 03-04-2017
Saying arccos(-√2/2) is the same as saying cos(x)=-√2/2. This is one the trigonometric values you should have memorized if you are taking a a trig class. In order to get √2/2, x must be equal to 45° or pi/4. But since it is a negative √2/2, the answer would be -45°or -pi/4.

There are technically multiple answers to this, but since you weren't given a range for the answers, I would stick with -45°. 

Hope this helps
Answer Link

Otras preguntas

Can someone plz simplify this and explain
Describe the acceleration of the cart shown. Assume there is no friction. A) The cart will eventually move to the left at constant speed. B) The cart will even
how is non-price competition different from price competition?
the combined area of two squares is 45 square centimetres each side is twice as long as a side of the other square what length of each side of the larger square
_____ is the study of all plants, including those that produce spores.
This is Ratio math look at the picture. ​
Find the lateral area of the pyramid to the nearest whole number.
Plz..... Solve this questions for me...
How did the Roman Empire react to citizens not wanting to join its army due to a decline in patriotism? A)they hired non-Romans German people or mercenaries B)t
Evaluate the following expression: