A ) x=77
b) x=8
c) x= 7.5
d) x=18
please help if you can !

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.