Let 0 be an angle in quadrant IV such that cot 0 = -2/7. Find the exact values of sin 0 and sec 0

In quadrant IV, cosine is positive and sine is negative. This means that

The cotangent is defined as the ratio between the cosine and sine:

So, we have the following equation:

Squaring both sides yields

The solution to this equation would be

But we know that the cosine has to be positive, so we have

And

Finally, the secant is the inverse of the cosine, so it's

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

the answer is d on edge

step-by-step explanation: