Solution

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Solution

Solution steps
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Rewrite using trig identities
Use the basic trigonometric identity:

Popular Examples

expand ((x^2-1)^5)/(10)expand expand sqrt(x(x-a)(x-b)(x-c)+a+c)expand expand (5(2a+b))/(3b)expand expand 1/((x-2)(a-b))expand expand (1-x^2)/(x(x^2+1))expand

Frequently Asked Questions (FAQ)

  • What is expand cos((1-k)pi) ?

    The solution to expand cos((1-k)pi) is -(-1)^k