Math, asked by maani6004, 1 year ago

If a lies in the third quadrant 3tana-4=0 then 5sina+3sina+4cosa

Answers

Answered by Anonymous
1

Step-by-step explanation:

3 tana - 4 = 0

3tana = 4

tana = 4/3 = लम्ब / आधार------(1)

चूँकि a 3rd quadrant में स्थित है।

अत: sin और cos के मान negative होंगे।

tana में लम्ब और आधार positive होने से कर्ण का मान negative होगा।

equation (1) से-

लम्ब = 4 , आधार = 3

कर्ण² = आधार² + लम्ब²

= 16 + 9 = 25

कर्ण = 5

sina = 4/5 , cosa = 3/5

then , 5sina +3sina +4cosa

8sina + 4cosa

8 * 4/5 + 4 * 3/5

32/5 + 12/5

44/5

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