Answer:
Step-by-step explanation:
Given that:
for
That means, angle is in the 3rd quadrant.
To find:
Value of cot(t)
Solution:
First of all, let us recall what trigonometric ratios are positive and what trigonometric ratios are negative in 3rd quadrant.
In 3rd quadrant, tangent and cotangent are positive.
All other trigonometric ratios are negative.
Let us have a look at the following identity:
here,
So,
But, angle is in 3rd quadrant, so value of
Answer:
The simplified answer is -42x + 21.
Step-by-step explanation:
Distribute the -7. -42x + 21.
Answer:
2 cm^2/sec
Step-by-step explanation:
side of cube ---- x cm
volume = x^3
d(volume)/dt = 3x^2 dx/dt
when c = 20, d(volume)/dt = 10 cm^3/sec
10 = 3(20^2) dx/dt
dx/dt = 10/1200 = 1/120 cm/sec
Surface area = SA = 6x^2
d(SA)/dt = 12x dx/dt
so when x = 20, as above
d(SA)/dt = 12(20)(1/120) cm^2/sec
= 2 cm^2/sec
The value of this problem would be 126. The degrees of the triangle is 180 so add the numbers 45 + 9 which equals 54. Then, you need to subtract 180 from 54 and that's how you find the value.