Question

The measure of angle O is 7pi/4. The measure of its reference angle is _degree, and tan O is _?

Answer 1

Identities that come from sums, differences, multiples, and fractions of angles

Answer 2

The measure of angle θ = 7pi/6. To convert this to degrees, substitute pi with 180 degrees. Pi is always equal to 180 degrees.

0 become:7 x 180/6
Therefore, 0 = 210 degrees.
And,to solve for sin 0, you can directly input sin (210) in the calculator.
Thus, sin 0 = sin (210) = -0.5 or -1/2

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