Question

In right angled D LMN, ÐLMN = 90°

ÐL = 50° and ÐN = 40°,

write the following ratios.

(i) sin 50° (ii) cos 50°

(iii) tan 40° (iv) cos 40°
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Answer 1

Answer:

1)sin = opposite side / hypotenuse

hence, sin50° = MN/LN

2)cos = adjacent side / hypotenuse

hence , cos 50° = LM/LN

3) tan = opposite side/adjacent side

hence ,tan40°= LN/MN

4)cos = adjacent side / hypotenuse

hence, cos 40°= MN/LN