Answer:
11
Step-by-step explanation:
Answer:

Step-by-step explanation:
using the 30- 60- 90 triangle for exact values , then
tan60° =
, and
cot60° =
= 
cos60° = 
cot60° cos60°
=
× 
=
← rationalise the denominator by multiplying by 
=
× 
= 
Answer:
hope that helps :))
Step-by-step explanation:
Step 1: Subtract 12c from both sides.
12c+12−12c=12c+9−12c
12=9
Step 2: Subtract 12 from both sides.
12−12=9−12
0=−3