Step-by-step explanation:
Using cos ^2x+sin^2 x = 1
RHS = cos ^2x+sin^2 x = 1
Therefore,
LHS = cos ^2 x − cos ^4 x
= cos ^2 x ( 1 − cos ^2 x )
= cos ^2 x sin ^2 x
= ( 1 − sin ^2 x ) sin ^2 x
= sin ^2 x − sin ^4 x
= RHS
The Answer here and if u want to solve something from math u can use photo math
The value of sin x in Q II is 0.86 .
<h3>What are Trigonometry ?</h3>
This the field in Maths which deals with a right angled triangle and the other angles in the triangle.
It is given that cot = -0.59
cot x = cos x / sin x
Using online trigonometric calculator
sin x in Q II is 0.86 .
To know more about Trigonometry
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Given, in the spinner 8 equal sectors, numbered 1 to 8.
So total numbers = 8.
Let, the probability of spinning a 3 is P(Three) and spinning an 8 is P(Eight).
Now we know that, probability of an event E is
P(E) = (number of outcomes in the event)/ (total number of possible outcomes).
So here number of outcomes for spinning a 3 is 1 and we have got total outcomes = 8.
So P(Three) = 
Similarly, P(Eight) = 
Probability of spinning a 3 or an 8 = P(Three) + P(Eight)
= 
As the denominator is same we can add the numerator.
= 
= 
Now we have to simplify the fraction by dividing the numerator and denominator by a common factor of them.
The common factor of 2 and 8 is 2. So by dividing them we will get,
= 
We have got the required answer.
The probability of spinning a 3 or an 8 is 
It’s the last one because 1/2 is way more then 2/5 so I think it would be 1/5<1/2 so the last one