Find sin θ if cot θ = - 4 and cos θ < 0.
a) - 17
b) sqrt 17 / 17
c)-1/4
d) sqrt 17 / 4

The correct option is B

Step-by-step explanation:

The correct option is B.

Solution:

We have given that

cot θ = - 4

cos θ < 0

This shows that both the ratios are negative. So they lie in second quadrant because both are negative.

cot θ = - 4  it means that tan θ = -1/4 which shows that two sides opposite = 1 and adjacent = -4

Now we could find hypotenuse by Pythagorean theorem:

Hypotenuse = √(1)²+(-4)² = √1+16

=√17

Sin θ  = perpendicular(opposite)/hypotenuse

Sin θ =1/√17

Now multiply and divide by √17

Sin θ=  1/√17*√17/√17

Sin θ = √17/17

Thus the correct option is B

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

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step-by-step explanation:

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