10 If A = 60° and B = 30°, verify that
nos
Sin (A + B) = sin A cos B + cos A sin B
cos (A + B)-
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Answered by
1
Answer:
cos (A+B) = cos A cos B + sin A sin B
= √3/ 2
Answered by
1
Step-by-step explanation:
Given,
A= 60
B=30
L.H.S .=Sin(A+B)=Sin(60+30)=Sin90=1
R.H.S. =SinA.CosB+CosA.SinB =Sin60.Cos30+Cos60.Sin30=✓3/2×✓3/2+1/2×1/2. =3/4+1/4=4/4=1
hence , L H S.=R.H.S.
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