Question

Find the value of the sec 19° using your calculator.

1.) 0.946
2.) 1.011
3.) 0.989
4.) 1.058

Answer 1

what's the definition of sec theta ???
like csc =1/sin theta

Answer 2

nvm \[\sin \theta =\frac{ 1 }{ \csc \theta }~~~\cos \theta =\frac{ 1 }{ \sec \theta }~~~\tan \theta =\frac{ 1 }{\cot \theta }\]
sin,cos ,tan and csc ,sec ,cot are reciprocal
if sin = 1/csc then csc = 1/sin
same way if cos =1/sec then sec =1/cos
now plugin to the calculator ....