Question

What is the result when the following expression is simplified as much as possible?

sin(2h)sec(h)+2sin(−h)​

Answer 1

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Because sin x is an odd function, we can rewrite the second term in the expression.

2sin(−h)=−2sin h.

We now use a double-angle formula to expand the first term.

sin(2h)sec h=2sin h cos h sec h.

Because they are reciprocals, cos h sec h=1.

2sin h cos h sec h−2sin h=2sin h−2sin h=0.

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Answer 2

Answer:

Simplifying an expression is just another way to say solving a math problem. When you simplify an expression, you're basically trying to write it in the simplest way possible. At the end, there shouldn't be any more adding, subtracting, multiplying, or dividing left to do.