Question

if sin(A+2B)=√3/2and cos (A+4B)=find A and B
the correct ans is A=30°
B=15°​

Answer 1

Answer:

sin(A + 2B) = √3/2

sin(A + 2B) = sin 60°

⇒ A + 2B = 60° -----(1)

also given that,

cos(A + 4B) = 0

cos(A + 4B) = cos 90°

⇒ A + 4B = 90° -----(2)

Subtracting (1) from (2), we get

A + 4B - A - 2B = 90° - 60°

2B = 30°

⇒ B = 15°

Putting B = 15° in eq (1), we get

A + 2 (15°) = 60°

A + 30° = 60°

⇒ A = 30°

Answer 2

fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact

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