What is expand cos((3pi)/4-(5pi)/4) ?

The solution to expand cos((3pi)/4-(5pi)/4) is 0

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expand cos((3pi)/4-(5pi)/4)

expand

cos (\frac{3 π}{4} - \frac{5 π}{4})

0

Solution steps

cos (\frac{3 π}{4} - \frac{5 π}{4})

Join

\frac{3 π}{4} - \frac{5 π}{4} : - \frac{π}{2}

= cos (- \frac{π}{2})

Use the following property:

cos (- x) = cos (x)

cos (- \frac{π}{2}) = cos (\frac{π}{2})

= cos (\frac{π}{2})

Use the following trivial identity:

cos (\frac{π}{2}) = 0

= 0

sin^{3} (2 x) (5 x + 3)^{7}

\frac{x}{( x + 1 ) ( x ^{2} + 4 )}

\frac{1}{( s - y ) ^{2}}

(x - \frac{1}{2})^{2} - \frac{81}{4}

e^{(i + 1) t}

What is expand cos((3pi)/4-(5pi)/4) ?
The solution to expand cos((3pi)/4-(5pi)/4) is 0