Grade 11Trigonometry
cos6x+ 6cos4x+ 15cos2x+10/ cos5x+ 5cos3x+ 10cosx
cos6x+ 6cos4x+ 15cos2x+10/ cos5x+ 5cos3x+ 10cosx
1 Answer
Vijay Mukati
Hint. Use the formula for cosa + cosB and try to convert the summation term into product terms.
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