Математика, тригонометрические уравнения. 6cos^2x+4sinxcosx=1 и аналогичное 5cos^2x+3sinxcosx=1

6cos²x+4sinxcosx-sin²x-cos²x=0/cos²xtg²x-4tgx-5=0tgx=aa²-4a-5=0a1+a2=4 U a1*a2=-5a1=-1⇒tgx=-1⇒x=-π/4+πn,n∈za2=5⇒tgx=5⇒x=arctg5+πk,k∈z5cos²x+3sinxcosx-sin²x-cos²x=0/cos²xtg²x-3tgx-4=0tgx=aa²-3a-4=0a1+a2=3 U a1*a2=-4a1=-1⇒tgx=-1⇒x=-π/4+πn,n∈za2=4⇒tgx=4⇒x=arctg4+πk,k∈z