molleyk molleyk

11-05-2018
Mathematics

contestada

If sin x =1/2 what
is cos x

Respuesta :

15-05-2018

[tex]\sin^2x+\cos^2x=1\to\cos^2x=1-\sin^2x\to\cos x=\sqrt{1-\sin^2x}\\\\\sin x=\dfrac{1}{2}\\\\\text{substitute}\\\\\cos x=\sqrt{1-\left(\dfrac{1}{2}\right)^2}=\sqrt{1-\dfrac{1}{4}}=\sqrt{\dfrac{3}{4}}=\dfrac{\sqrt3}{\sqrt4}=\dfrac{\sqrt3}{2}[/tex]

Answer Link

Otras preguntas

what is a rational number that fits between 3.64 and 3.46

find the sum of 8x + 10 - 6x + 4 = 24

Because the subject of a composition is like a crystal with many facets, you should a. be very critical of your sources. b. offer your reader ideas from sever

What is the volume of a sphere with a diameter of 14 centimeters? Use 3.14 for pi. Round your answer to the nearest hundredth. 1077.02cm^3 1436.03cm^3 1975.43cm

-2, -1, -1, 0, -1, 1, -2... what are the next three numbers in the pattern? Describe the pattern.

What is 7/100 in simplest form

a rectangle measures 14 centimetres by 4 centimetres what is its area

7 times a number is 3 thousand 5 hundered what is the number

Unscramble each adverb! The clue of the word has been provided. daylitemime- "I said, right now!" tallcandyice- "I didn't mean to do that!" saylaw-"Every singl

Four times the difference of a number and 9 is equal to 8