Question

1. Find the mode for the following data:
CI 20 - 40 40 - 60 60 - 80 80 - 100 100 - 120
12 13 15 10 5
2. Find the mean for the following frequency distribution using s
TTTTATA​

Answer 1

Answer:

please question again

Answer 2

Answer:

Step-by-step explanation:

Given, Sin0 + Sin20 = 1

TPT :- Cos20 + Cos40 = 0

Now, Sin0 + Sin20 = Sin90°

0 + 20 = 90°

30 = 90°

0 = 30°

Hence we have to find the following :-

Cos 2 * 30° + Cos 4 * 30°

Cos 60° + Cos 120°

1/2 - 1/2 = 0

( Hence Proved )

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