sin (45° + A) - sin (45° - A)= √2 sin A.
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1
Step-by-step explanation:
sin(a+b)= Sina cosb+cosa sin b
sin(a-b) = sina cos b-cosa sinb
so
sin(a+b)-sin(a-b) = 2cosa sinb
= 2*cos45.sin A
=2*(1/√2).sinA
=√2sinA
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2
Answer:
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