csc(2x) = csc(x)/(2cos(x))
1/(sin(2x)) = csc(x)/(2cos(x))
1/(2*sin(x)*cos(x)) = csc(x)/(2cos(x))
(1/sin(x))*1/(2*cos(x)) = csc(x)/(2cos(x))
csc(x)*1/(2*cos(x)) = csc(x)/(2cos(x))
csc(x)/(2*cos(x)) = csc(x)/(2cos(x))
The identity is confirmed. Notice how I only altered the left hand side (LHS) keeping the right hand side (RHS) the same each time.
Answer:a = 7
b = 9
c = 4
Explanation:Kindly check the attached image for full explanation
Hope this helps :)
Answer:
60
Step-by-step explanation:
120°+90°+90°+x=360°
or,300°+x=360°
.•.x=60°
X^3 + 8 = x^3 + 2^3, a sum of two cubes.
So it can be factorised using the sum of two cubes rule...
a^3 + b^3 = (a + b)(a^2 - ab + b^2).
Therefore
x^3 + 8 = (x + 2)(x^2 - 2x + 4).
Hope this helps