Anitha says that "Cos (A+b)=CosA + CosB". Do you agree with her? Justify
your answer.
Answers
Answered by
8
Answer:
It is wrong,
let A =60 ,B= 30
lhs = cos(A+B)
= cos(60+30)
=cos 90
=0
rhs = cos A+cos B
= cos 60+ cos 30
= 1/2+ root3/2
=(1+ root3)/2
therefore
lhs is not equal to rhs
Step-by-step explanation:
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Answered by
1
Answer:
hey mate cos(a + b ) is cosa. cosb - sina . sinb
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