Trigonometry skill builder questions - set 1- IB/ HL/SL

1. Fill in the blanks

• a. sin( 90 - x ) = __________

• b. cos ( 90 - x) = __________

• c. sin(180 - x) = ___________

• d. cos ( 180 - x) = __________

• e. sin(360 - x) = ___________

• f. cos ( 360 - x) = __________

• g. cos is positive in ___ and _____ quadrants.

• h. sin (360 + x) = _______ 

2. State whether the following statements are true or false. If false, correct the statement

• a. sin is positive in I and IV quadrants

• b. The value of sin 210 is positive.

• c. When a ray is rotated clockwise, the subtended angle is negative.

• d. secant is the reciprocal of sine.

• e. tan 90 is not defined

• f. cos(360 + x) is positive.

• g. There is a square identity connecting sine and cosine ratios.

3. Given sin 25 = 0.4226 find the values of the following

• a. sin 155

• b. sin 205

• c. sin 335

• d. sin 385