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Factorize the following: cos²B + 5cosB - 6​
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2 votes
Factorize the following: cos²B + 5cosB - 6​

User Gage Hendy Ya Boy
by
7.5k points

1 Answer

4 votes

Answer:

(cosB-1)(cosB+6)

Explanation:

use u substitution . u = cosB

u^2+5u-6

factor

(u-1)(u+6)

put cosB back in for u

(cosB-1)(cosB+6)

User Joan Cardona
by
6.8k points
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