Question

Sin(20)(4+sec(20)) value?

Answer 1

have you tried or started yet? :)

Answer 2

some helpful hints that you'll need to use:
\[\sec 20 = \frac{ 1 }{ \cos20 }\]
You'll probably also need to use this one:
\[\sin2x = 2sinxcosx \rightarrow 2\sin2x = 4sinxcosx\]
Lastly, recall that you'll be using exact values here so you'll need this: