Question: 3. Use the reference angle concept and the information that cos(55) 0.5736 and sin(81) 0.9877, to find the value of each of the following,

$3. Use the reference angle concept and the information that ( cos left(55^{circ}ight) approx 0.5736 ) and ( sin le$

3. Use the reference angle concept and the information that cos(55) 0.5736 and sin(81) 0.9877, to find the value of each of the following, without using a calculator: (i) (ii) cos(305) sin(261) 4. Evaluate each of the following and give the exact answer without using a calculator. Use the special angles and the trigonometric values of them. (a) sin() cos(-1) (b) tan(-37) csc()

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