IS IT RIGHT TO SAY THAT COS (A+B) = COS A + COS B
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no its wrong we cant say like that because (A+B) replaced theeta there
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1
Answer:
Let A=30
B=60
LHS = COS (A+B)
= COS (30+60)
= COS (90)
= 0
RHS = COS A + COS B
= COS 30 + COS 60
= ROOT3/2 + 1/2
= ROOT3 + 1 / 2
HERE, LHS NOT EQUAL TO RHS
SO, IT IS NOT RIGHT TO SAY THAT COS(A+B) = COS A +COS B
Step-by-step explanation:
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