Practice problem
Given sin(a)=45\sin(a)=\frac45sin(a)=54 and cos(b)=13\cos(b)=\frac13cos(b)=31, with aaa and bbb both in the interval [0,π2)[0,\frac{\pi}2)[0,2π) find sin(a−b)\sin(a-b)sin(a−b).
4−6215\frac{4-6\sqrt2}{15}154−62
−4−6215-\frac{4-6\sqrt2}{15}−154−62
4−3015\frac{4-\sqrt{30}}{15}154−30
−4−3015-\frac{4-\sqrt{30}}{15}−154−30
Type a concept, like “slope” or “photosynthesis”.