Test: Trigonometric Functions I - Challenging

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Question 1:   Find the coordinates of the point on the circle which was obtained by rotating of point P 1;0 by the angle of 90° .
P1 1;0
P1 0;1
P1 0;1
P1 0;0
Question 2:   Solve the expression 2 sin 2 π 4 + cos 2 π 6 .
1
1 3 4
0
1.5
Question 3:   Simplify the expression:   sinα sinα ,  if   α   is located in the third coordinate quarter.
1
 0
2sinα
sinα
Question 4:   Compare two expressions sin60° and sin 7π 6 .
sin60°  sin 7π 6
sin60° < sin 7π 6
sin60°= sin 7π 6
sin60° > sin 7π 6
Question 5:   Find the period ( T ) of the function y=tg 6x 7 .
7π 6
6π 7
π
2π
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