10.
Use the tangent ratio to find the size of the angle marked x, correct to the nearest degree.

Ihonestly have no clue if it's each or none.

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

How can you check that you have correctly converted frequencies to relative frequencies?