How do you solve $b/sin45=21/sin100$ ?

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Answer 1 · 2018-01-27T11:36:51

$b=15.1(1dp)$

this is an exercise in rearranging and using a calculator

$b/(sin45)=21/sin100$

multiply both sides by $sin45$

$b/cancel((sin45)) xxcancel(sin45)=21/sin100xxsin45$

$=>b=(21sin45)/sin100$

using a calculator we find

$b=15.0783159=15.1(1dp)$

How do you solve b/sin45=21/sin100b/sin45=21/sin100?