Find the value of 3sin?-4sin3?/1+2cos2? if cot?= root 3.
ravi , 7 Years ago
Grade 12th pass
Trigonometry> Find the value of 3sin?-4sin3?/1+2cos2? i...
2 Answers
vishesh jain
Last Activity: 7 Years ago
Cot? = root3 ?=30° (3sin30°-4sin90°)/1+2cos60°Put the value of sin30, sin90, cos 60 in questionAnswer= -5/4
Arun
Last Activity: 7 Years ago
Because cot? = 
3
Hence
? = 30°
Now
The question becomes
(3 sin30 - 4 sin90)/(1+2 cos60)
Put sin30 = ½
Sin90 = 1
Cos60 = ½
(3/2 - 4)/(1+1)
= -5/4
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