Question

A pendulum swings through an angle of 300

and describes an arc 17.6 cm in length.

Find the length of pendulum.
tell me fast​

Answer 1

Here,

θ=30

o

l=arc=8.8 cm

l=

360

o

θ

×2πr

8.8=

360

30

×2

7

22

×r

r=

22

8.8×6×7

=16.8 cm

hence,

A pendulum swings through an angle of 30^0 and describes an arc 8.8 cm in length. Therefore, the length of the pendulum is 16.8 cm.

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Answer 2

Answer:

If cosec theta + cot theta = k prove that cos theta = k2-1 / k2 + 1