Q7 of 180 Page 3

A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 60° with the wall, then the height of the wall is

Let AB and AC be the ladder and wall respectively.

Given, ladder makes an angle of 60° with wall

∠A = 60°

Also, length of ladder, AC = 15 m

To find: height of wall i.e. AB

We have,

Hence, Option C is correct.

The value of 2tan²45° + cos²30° + sin²60° is

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