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f\times \left(\frac{1}{2}\right)^{2}+\left(\cos(\frac{\pi }{3})\right)^{2}-\left(\tan(\frac{\pi }{4})\right)^{2}=-\frac{1}{2}
Get the value of \sin(\frac{\pi }{6}) from trigonometric values table.
f\times \frac{1}{4}+\left(\cos(\frac{\pi }{3})\right)^{2}-\left(\tan(\frac{\pi }{4})\right)^{2}=-\frac{1}{2}
Calculate \frac{1}{2} to the power of 2 and get \frac{1}{4}.
f\times \frac{1}{4}+\left(\frac{1}{2}\right)^{2}-\left(\tan(\frac{\pi }{4})\right)^{2}=-\frac{1}{2}
Get the value of \cos(\frac{\pi }{3}) from trigonometric values table.
f\times \frac{1}{4}+\frac{1}{4}-\left(\tan(\frac{\pi }{4})\right)^{2}=-\frac{1}{2}
Calculate \frac{1}{2} to the power of 2 and get \frac{1}{4}.
f\times \frac{1}{4}+\frac{1}{4}-1^{2}=-\frac{1}{2}
Get the value of \tan(\frac{\pi }{4}) from trigonometric values table.
f\times \frac{1}{4}+\frac{1}{4}-1=-\frac{1}{2}
Calculate 1 to the power of 2 and get 1.
f\times \frac{1}{4}-\frac{3}{4}=-\frac{1}{2}
Subtract 1 from \frac{1}{4} to get -\frac{3}{4}.
f\times \frac{1}{4}=-\frac{1}{2}+\frac{3}{4}
Add \frac{3}{4} to both sides.
f\times \frac{1}{4}=\frac{1}{4}
Add -\frac{1}{2} and \frac{3}{4} to get \frac{1}{4}.
f=\frac{1}{4}\times 4
Multiply both sides by 4, the reciprocal of \frac{1}{4}.
f=1
Multiply \frac{1}{4} and 4 to get 1.