Question

(HELP ASAP HIGH POINTS) Which double-angle or half-angle identity would you use to verify the following:

Answer 1

Answer:

B

Step-by-step explanation:

Using the trigonometric identities

• cscx = $\frac{1}{sinx}$ and secx = $\frac{1}{cosx}$

Consider the left side

cscx sec x = $\frac{1}{sinx}$ × $\frac{1}{cosx}$ = $\frac{1}{sinxcosx}$

Consider the right side

2 csc2x = $\frac{2}{sin2x}$ = $\frac{2}{2sinxcosx}$ = $\frac{1}{sinxcosx}$

left side = right side hence identity is verified