Which of the following explains why Cosine 60 degrees = sine 30 degrees using the unit circle?

The sine and cosine are complementary functions.

Step-by-step explanation:

In a right angle triangle, the two angle angle are complementary.

This means they add up to 90 degrees.

One special property of the right angle triangle is that, the sine of angle is equal to the cosine of its complement.

On the unit circle we can also create a special right angle triangle with its hypotenuse being one unit.

The complementary property still applies to this right angle triangle.

77

step-by-step explanation:

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!