Exercise 1 : |
Which number 2; 0,45; 0,8 can be value of function y = sin x ?
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Exercise 2 : |
Which number -0,56; - 5,6; 1,09;  ;  can be value of function y = cos x ?
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Exercise 3 : |
Does exist x Î R, for which is cos x = sin x = 0 ?
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Exercise 4 : |
Find out if functional value y = sin x or y = cos x is in point x positive, negative or zero:
a) x = 12/7 p b) x = - 16/3 p c) x = 2 d) x = 856° |
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Exercise 5 : |
To which interval 
belongs x
for which is:
a) sin x = 0,8 /\ cos x < 0 p b) sin x £ 0 /\ cos x = - 0,3 ? |
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Exercise 6 : |
Draw grafs of functions:
a) y = sin x b) y = 2 * cos x c) y = 0,5 sin x - 1 d) y = sin ( x - p / 3 ) e) y = cos ( x + p / 4 ) f) y = cos ( x - p / 6 ) |