SINA+COSA=21/2(COSB)then A=?
PANKAJ , 9 Years ago
Grade 12th pass
Trigonometry> SINA+COSA=2 1/2 (COSB) then A=?
1 Answers
PK NAIN
Last Activity: 9 Years ago
divide the LHS and RHS term with 21/2 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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