Answer:
a).

since sine is in the 2nd quadrant, other angle = 180° - x:

we must make two rotations since it's a double angle:

divide each angle by 2:

Answer = <u>{</u><u>x</u><u>:</u><u> </u><u>x</u><u> </u><u>=</u><u> </u><u>2</u><u>2</u><u>.</u><u>5</u><u>°</u><u>,</u><u> </u><u>6</u><u>7</u><u>.</u><u>5</u><u>°</u><u>,</u><u> </u><u>1</u><u>1</u><u>2</u><u>.</u><u>5</u><u>°</u><u>,</u><u> </u><u>1</u><u>5</u><u>7</u><u>.</u><u>5</u><u>°</u><u>,</u><u> </u><u>2</u><u>4</u><u>7</u><u>.</u><u>5</u><u>,</u><u> </u><u>3</u><u>3</u><u>7</u><u>.</u><u>5</u><u>°</u><u>}</u>
b).

since ans is negative, we take the quadrants of cosine and tangent:

we make three rotations:

answer is <u>{</u><u>z</u><u> </u><u>:</u><u> </u><u>z</u><u> </u><u>=</u><u> </u><u>1</u><u>2</u><u>8</u><u>.</u><u>3</u><u>°</u><u>,</u><u> </u><u>1</u><u>7</u><u>1</u><u>.</u><u>7</u><u>°</u><u>,</u><u> </u><u>2</u><u>3</u><u>1</u><u>.</u><u>7</u><u>°</u><u>,</u><u> </u><u>2</u><u>9</u><u>1</u><u>.</u><u>7</u><u>°</u><u>,</u><u> </u><u>3</u><u>5</u><u>1</u><u>.</u><u>7</u><u>°</u><u>}</u>