The cone

The cone's lateral surface area of the cone is 4 cm2, the area of the base is 2 cm2. Find the angle in degrees (deviation) of the cone sine and the cone base plane.
(Cone side is the segment joining the vertex cone with any point of the base circle. All sides of the cone form the shell of the cone.)

Correct answer:

α =  60 °

Step-by-step explanation:

S1=2=πr2 r=2/π=0.7979 cm S2=4=πrs s=4/pi/r=1.5958 cm cosα=r/s α=arccosr/s=60

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