2sinA into cosA = cosA than what is the value of A??
alok1926:
ooo if 30 degree is correct answer
Answers
Answered by
3
Answer: 30°
Step-by-step explanation:
2×sin30°×cos30°=cos30°
2×1/2×√3/2=√3/2
√3/2=√3/2
Hence proved
Then show that x+y+z/a+b+c
= ax+by+cz/a^2+b^2+c^2
Then show that x+y+z/a+b+c
= ax+by+cz/a^2+b^2+c^2
Answered by
1
Answer:
A= 90 or 30 deg
Step-by-step explanation:
2SinACosA = CosA
2sinAcosA - cosA = 0
CosA(2SinA-1) = 0
CosA = 0 means A = 90 deg
2SinA - 1 = 0 menas SinA = 1/2 => A = 30 deg
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