The product of sin B and tan C is c/a
The product of sin C and tan B is b/a
Further explanation
We can use
SOH stands for Sine = Opposite ÷ Hypotenuse.
CAH stands for Cosine = Adjacent ÷ Hypotenuse.
TOA stands for Tangent = Opposite ÷ Adjacent.
There is a picture attached
![\tt sin~B=(b)/(a)\\\\Tan~C=(c)/(b)\\\\sin~B* Tan~C=(b)/(a)* (c)/(b)=(c)/(a)](https://img.qammunity.org/2021/formulas/mathematics/high-school/2bnzosnvm8nggaz33xgud2wdyx9ryst4p5.png)
![\tt sin~C=(c)/(a)\\\\Tan~B=(b)/(c)\\\\sin~C* tan~B=(c)/(a)* (b)/(c)=(b)/(a)](https://img.qammunity.org/2021/formulas/mathematics/high-school/gqvs52bkdfuniof1yagpdlrtw1oasltjb8.png)