Answer:
Step-by-step explanation:
3 sin²x-2cos x-3=0
3(1-cos² x)-2 cos x-3=0
3-3 cos²x-2 cos x-3=0
-3 cos ²x-2 cos x=0
cos x( -3cos x-2)=0
cos x=0
x=(2n+1)π/2,where n is an integer.
or -3 cos x-2=0
3 cos x=-2
cos x=-2/3
x=cos ^{-1}(-2/3)≈131.81°
180/7=25.71428571 per hour
25.71428571/60=0.428571428 (per second
0.428571428/60=0.007142857 (per minute) miles
in foot it is 0.000595238
Answer:
If this is for a triangle then the answer is 45°
Step-by-step explanation:
Triangles are always 180° so if you have a right angle know that, that means the angle is 90°. So angle CAB is 90° and angle DAB is 45°. You take 180° and subtract 90° which leaves you with 90°. Then you take that 90° and subtract 45° and that leaves you with 45°.
