Question

using tables find the value of (2sin thita—cos thita ) (i) when thita =35degree

Answer 1

$\sin( \alpha ) = \cos(90 - \alpha ) \\ \cos( \alpha ) = \sin(90 - \alpha ) \\ 2 \sin( \alpha ) - \cos( \alpha ) \\ 2 \cos(90 - 35) - \sin(90 - 35 ) \\ 2 \cos(55) - \sin(55) \\ 0.328001$