If a and B are positive acute angles, sin (4a - B) = 1 and cos(2a+B) = – McqOptions

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1.	If a and B are positive acute angles, sin (4a - B) = 1 and cos(2a+B) = 1/2, then the value of sin(a + 2B) is :
A.	0
B.	1
C.	√3/2
D.	1/√2
Answer» E.

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