solve dis problem
Lesson:Trignometry
question: use adjoining figure and write the value of :
1) sin x°
2) cos y°
3) 3 tan x° - 2 sin y° + 4 cos y°
[hint. AB = root AC^ - BC^]
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4
Answer:
1)AB=(289-64)^1/2
AB=225^1/2=15
sinx= BC/AC
sinx=8/17
2)in DBC
B is right angle
by pythagorous theorem
DC^2=BC^2+DB^2
DC^2=8^2+6^2=64+36=100
DC=10cm
cosy=DB/DC=6/10=3/5
3)tanx=BC/AC=8/15
siny=BC/DC=8/10=4/5
3tanx-2siny+4cosy=3×8/15 -2×4/5 +4×3/5
3tanx-2siny+4cosy=8/5-8/5+12/5=12/5
thank you
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2
Step-by-step explanation:
doneee! its corret pakka 100%
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