Answer:
B
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180° , then
y + 10 + 2y + 50 = 180 , that is
3y + 60 = 180 ( subtract 60 from both sides )
3y = 120 ( divide both sides by 3 )
y = 40 → B
The ratio is rational and by multiplying or dividing the numbers included in the ratio by the same number, it's just like taking a fraction and taking it out of simplest form, it doesn't change the value of the ratio or the fraction in simplest form, it just changes the numbers
ANSWER
B.
EXPLANATION
The given expression is
(sin x + 1)(sin x − 1)
Note that:
This implies that,
We can factor -1 on the right hand side to get,
Note that from the Pythagorean Identity
We apply this identity to obtain:
The correct choice is B