SINA+COSA=2 1/2 (COSB) then A=?

Question

PK NAIN · Answer

divide the LHS and RHS term with 2 1/2 and then apply the formula cos(a-b). . we get cos(45-a)=cosb b=mpi+-(45-a) which is the required answer

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SINA+COSA=2 1/2 (COSB) then A=?

SINA+COSA=2^1/2(COSB) then A=?

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SINA+COSA=2 1/2 (COSB) then A=?

SINA+COSA=21/2(COSB) then A=?

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SINA+COSA=2^1/2(COSB) then A=?