Grade 12th passTrigonometry
If sinA+sin^2A=1 and acos^12A+bcos^8A+ccos^6A−1=0 then b+c/a+b=?
If sinA+sin^2A=1 and acos^12A+bcos^8A+ccos^6A−1=0 then b+c/a+b=?
1 Answer
Arun
sin@+sin^2@=1
=>sin@=1-sin^2@=cos^2@
Now we know
cos^12@+3cos^10@+3cos^8@+cos^6@-1 = 0
Hence
Now find a, b, c, d and then find answer.
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