Answer:
B
Step-by-step explanation:
using the cofunction identity
• sin (90 - x) = cosx / cos(90 - x) = sinx, hence
cos 19° = sin(90 - 19)° = sin 71°
Answer:sin75=√(2+√3)/2
Step-by-step explanation:
Cosx=1-2sin^2(x/2) let x=150
Cos150=1-2sin^2(150/2) cos150=-√3/2
-(√3)/2=1-2sin^2(75)
2sin^2(75)=1+(√3)/2
2sin^2(75)=(2+√3)/2
Cross multiply
2x2sin^2(75)=2+√3
4sin^2(75)=2+√3
sin^2(75)=(2+√3)/4
Take square root of both sides
sin75=√(2+√3)/√4
sin75=√(2+√3)/2
Answer:
y = x + 2
Step-by-step explanation:
Well, to be parallel, the slope has to be equal to eachother, so we can say m=1
setting the equation up:
y-7 = 1(x-5)
y = x + 2
Answer:
-11/3
Step-by-step explanation:
14-3(x+1)
14-3x-3=22
11-3x=22
-3x=22-11
-3x=11
x=-11/3
x=-3 2/3
Answer:
![\large\boxed{\dfrac{1}{27}}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%5Cdfrac%7B1%7D%7B27%7D%7D)
Step-by-step explanation:
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