16 which is the parametric form of the polar equation r 30 a

16. which is the parametric form of the polar equation r 30? a point) Ox 36 cos 30 sin 36 cos 8 30 sin 3 cos y 3sin 17. Which is the polar form of the parametric equationsx 2 cos 6 andy 2 sin 0? a point) Or 2 Or 20 Or m 4 cos e sin e 18. Which is the polar form of the parametric equations x 2t and y 12? a point Or 4 sec Or 4 sec Or 4 tan sec e 19. A bowling ball is rolled down the alley with a constant velocity of 1.4 m/sec. at an angle of 86 to the starting line. The position of the person throwing the bowling ball can be represented by the point (0.00. Where is the ball after 8 seconds? O (0.1.1.4) O (0.6.8.0) O (0.8.11.2) O (11.2,0.8)

Solution

r=-3 theta

x=-3theta cos theta

y=-3 theta sin theta

squaring and adding them we get

x²+y²=9 theta²(cos²theta + sin²theta)

x²+y²=9 theta²

r²=9 theta²

r=-3 theta

correct option is second .