Sine/Cosine/Important values/Exercise

Show that the sine function and the cosine function have the following values.

a)

${}\sin {\frac {\pi }{4}}=\cos {\frac {\pi }{4}}={\frac {1}{\sqrt {2}}}\,.$

b)

${}\cos {\frac {\pi }{3}}={\frac {1}{2}}\,.$

c)

${}\sin {\frac {\pi }{3}}={\frac {\sqrt {3}}{2}}\,.$

Create a solution