4 cos² x - 3 = 0
4 cos² x = 3
cos² x = 3/4
cos x = ±(√3)/2
Fixing the squared cosine doesn't discriminate among quadrants. There's one in every quadrant
cos x = ± cos(π/6)
Let's do plus first. In general, cos x = cos a has solutions x = ±a + 2πk integer k
cos x = cos(π/6)
x = ±π/6 + 2πk
Minus next.
cos x = -cos(π/6)
cos x = cos(π - π/6)
cos x = cos(5π/6)
x = ±5π/6 + 2πk
We'll write all our solutions as
x = { -5π/6, -π/6, π/6, 5π/6 } + 2πk integer k
The decimal equivalent is 0.25.
Answer:
slope can only be showed by the word <em><u>GRADIENT</u></em>
Step-by-step explanation:
A <em>slope</em><em> </em>means how much something is <em>slanting</em>
like if something is <u>Inclined</u><u> </u>at a specific degree. e. g. <em>This</em><em> </em><em>house</em><em> </em><em>is</em><em> </em><em>inclined</em><em> </em><em>at</em><em> </em><em>4</em><em>5</em><em>°</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>road</em>
