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# 7.4E: The Other Trigonometric Functions (Exercises)

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For the following exercises, find the exact value of the given expression.

39. $$\cos \frac{\pi}{6}$$

40. $$\tan \frac{\pi}{4}$$

41. $$\csc \frac{\pi}{3}$$

42. $$\sec \frac{\pi}{4}$$

For the following exercises, use reference angles to evaluate the given expression.

43. $$\sec \frac{11 \pi}{3}$$

44. $$\sec 315^{\circ}$$

45. If $$\sec (t)=-2.5,$$ what is the $$\sec (-t) ?$$

46. If $$\tan (t)=-0.6,$$ what is the $$\tan (-t) ?$$

47. If $$\tan (t)=\frac{1}{3},$$ find $$\tan (t-\pi)$$

48. If $$\cos (t)=\frac{\sqrt{2}}{2},$$ find $$\sin (t+2 \pi) .$$ There are two possible solutions.

49. Which trigonometric functions are even?

50. Which trigonometric functions are odd?

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