Помогите решить:2tg^{2}x+3tgx-2=0 2cos^{2}x-3sinxcosx+sin^{2}x=09sinCosx-7cos^{2}x=2sinxcos2x=2cosx-1sinx+\sqrt{3}cosx=0sin7x-si

Помогите решить:

<var>2tg^{2}x+3tgx-2=0 </var>

<var>2cos^{2}x-3sinxcosx+sin^{2}x=0</var>

9sinCosx-7cos^{2}x=2sinx

cos2x=2cosx-1

sinx+<span>\sqrt{3}cosx=0</span>

<span>sin7x-sinx=cos4x</span>