Find $\left.\frac{\partial H}{\partial w}\right|_{(\pi / 4, \pi / 2)}$ To 2 Decimal Places If

Essay

Find $\left.\frac{\partial H}{\partial w}\right|_{(\pi / 4, \pi / 2)}$ to 2 decimal places if $H ( w , t ) = e ^ { \cos ( 2 w + 2 t ) }$ .