Answer:
15
Step-by-step explanation:
x=-4
from left hand side:tan^2/secx=(,sin^2x/cos^2x)/(1/cosx)=sin^2x/cosx=sinx×sinx/cosx=sinx.tanx=right hand side.verified.
10 ( b+10)
10 b + 100
Factor out a 10
10 * b + 10 * 10
10 ( b+ 10)
hope it helps !!!!
