Answer:
f(4.5) I think
Step-by-step explanation:
X<0
y > 0
so x is negative and y is positive
Quad. II
answer
Quadrant II
well the x would be 2 and the y would be 25 i think
Answer:
cos 2 x=1-sin^2 x
Step-by-step explanation:
x=-135°
cos 2x=cos (-270)=cos (-270+360)=cos 90=0
or cos 2x=1-2sin ²x=1-2(sin (-135))²
=1-2(-sin 135)²
=1-2(sin 135)²
=1-2(sin (180-45))²
=1-2(sin²45)
=1-2 (\frac{1}{\sqrt{2}})²
=1-1
=0
