Write an expression for cos 68° using sine

The expression for cos 68° can write in sine using co function identity.

The expression for cos 68° using sine can written as sin 22° .

Given

The given expression is cos 68°.

Using co function identity write the expression.

Substitute 68° for .

Thus, the expression for cos 68° using sine can written as sin 22° .

Learn more about co function identity here:

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sin22°

Step-by-step explanation:

Using the cofunction identity

cos x = sin (90 - x), then

cos68° = sin(90 - 68)° = sin22°

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).