2.86 the negatives will cancel it self den u divide it
Answer:
The answer is "
"
Step-by-step explanation:
Given values:

Using formula:

Put the values in the above formula:

30°
A strait line is 180°
75°+75°=150°
180°-150°=30°
Answer:
Option A.
Step-by-step explanation:
It is given secθ = - 
then cosθ = -
Now we know the identity
sinθ = 
= 
= 
Now sin2θ = 2sinθcosθ
Now we put the values of cosine and sine in the formula
sin2θ = 2×(-
)(
)
= -
Therefore, option A. is the answer.