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Chapter 7: Q. 48 (page 474)

In problems 19-98, establish each identity.

cos胃+1cos胃-1=1+sec胃1-sec胃

Short Answer

Expert verified

We have proved the identitycos胃+1cos胃-1=1+sec胃1-sec胃.

Step by step solution

01

Step 1. Given information.

We have:

cos胃+1cos胃-1=1+sec胃1-sec胃

02

Step 2. Establish the identity.

Take the left hand side:

cos胃+1cos胃-1

Apply identity: cos胃=1sec胃

=1sec胃+11sec胃-1=1+sec胃sec胃1-sec胃sec胃=1+sec胃1-sec胃

Hence, proved.

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Most popular questions from this chapter

Establish each identity.

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In Problems 9鈥�36, find the exact value of each expression.

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