Question

2cos = 1, when 0° <θ° < 90°​

Answer 1

Answer:

In this question, we need to use the direct proportion twice.

First, we need to find the price of 25 bags for exchanging silver. That can be found out by applying direct proportion.

2200

40

=

x

25

x = ₹ 1,375

This value of x gives the price of 30 grams of silver.

To find the price of 150 grams of silver, we apply direct proportion again.

30

1375

=

150

y

⟹

y = ₹ 6,875

Answer 2

Answer:

cos = 1/2

cos = 60°

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