Question

Explain why you will get an error for cos-1(-1.008). Specific.2) Solve algebraically, 2sin(3x)-1=0, give the first exact positive solutions.

Answer 1

Answer:

Given that:

The sum of two numbers is 36.

And their product is 248.

To Find:

What will be the sum of their reciprocals.

Let us assume:

One number be X.

Another number be Y.

Now we have:

Sum of numbers = X + Y = 36

Product of numbers = XY = 248

Sum of their reciprocals:

\mathtt{ = \dfrac{1}{X} + \dfrac{1}{Y} }=

X

1

+

Y

1

\mathtt{ = \dfrac{Y + X}{XY} }=

XY

Y+X

Putting the values.

\mathtt{ = \dfrac{36}{248} }=

248

36

\mathtt{ = \dfrac{9}{62} }=

62

9

Hence,

The sum of their reciprocals \mathtt{ = \dfrac{9}{62} }=

62

9