Answer: 1 
Step-by-step explanation:
Notice the picture below
see where that angle is?
check your Unit Circle for that value
also notice, that fractions of
are just like grabbing 180 degrees and splitting it, so one third of 180 or
is 180/3 or 60 degrees
Here's link to the answer:
tinyurl.com/wpazsebu
Answer:
there is a one out of five chance that he will get the answer right
Step-by-step explanation:
Answer:
Option: a is correct
a) y= -cos x
Step-by-step explanation:
We could clearly see that the graph of the function passes through a point on the y-axis which is :
(0,-1)
i.e. when x=0 the value of the function y= -1
So we will check in each of the following options by putting x=0 and check whether y= -1 or not.
b)
y=sin x
on putting x=0 we get:
y=sin 0=0≠ -1.
Hence, option b is incorrect.
c)
y= cos x.
we put x=0
y= cos 0=1≠ -1.
Hence, option c) is incorrect.
d)
y= -sin x
we put x=0 to obtain:
y= -sin 0=0≠ -1.
Hence, option d is incorrect.
Hence we are left with option a i.e.
The graph represents the function:
y= -cos x. (Hence, option a is correct)
( Also it satisfies at x=0
since, y= -cos 0= -1 )
