need help wirh part a and b 1. Find all different solutions to the triangle problems,...
what is cos2xcos7x+sin7xsin2x equvivalent to? cos 9x sin9x cos^2(9x)-sin^2(9x) cos5x show the work as well might nwed these formulas 2 sum & Difference Identities sin latb) sina cosb + cos a sinb. Sinca sina cos b-Cosa sinb cos lab) = cos a Casb- sing sinb COSLO-b = cosa cos b+ sino sinb tanla+batang tan b Power reducing Formulas 1 tang tanb sindo - 1-Cosao tanla-b) = tana - tank 1+ tangtanbo cos6= 1+ cosa e Double Angle Identites sin axo...