Engineering Board Exam Reviewer · Trigonometric Identities · medium

Simplify: ≤ft(- ≤ft( ) + ≤ft( ) ) ≤ft(- ≤ft( ) + ≤ft( ) )

1. ≤ft( )
2. ≤ft( ) ≤ft( )
3. 1 ≤ft( ) ≤ft( )
4. ≤ft( ) + ≤ft( )

Answer

B. ≤ft( ) ≤ft( )

Solution

- = 2 / and - = 2 / . Their product is .

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