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Chapter 7: Q.18 (page 473)

Factor and simplify:cos2(胃)-1cos2(胃)-cos(胃)

Short Answer

Expert verified

on simplifying we get,1-sec(胃)

Step by step solution

01

Given information

We are given an expressioncos2(胃)-1cos2(胃)-cos(胃)

02

Simplify the expression

We get,

cos2(胃)-1cos2(胃)-cos(胃)=(cos(胃)-1)(cos(胃)+1)cos(胃)(cos(胃)-1)=1+cos(胃)cos(胃)=1+sec(胃)

03

Conclusion

On simplifying we get the expression as1+sec(胃)

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