SOLUTION: evaluate the following trigonometric functions: (a) sin(-.9) (b) sec 1.8

Algebra ->  Trigonometry-basics -> SOLUTION: evaluate the following trigonometric functions: (a) sin(-.9) (b) sec 1.8      Log On


   

Question 593395: evaluate the following trigonometric functions:
(a) sin(-.9)
(b) sec 1.8
Answer by solver91311(24713) About Me  (Show Source):
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Decide first whether your function arguments represent radian or degree measure. Set your calculator mode appropriately.

(a) press the decimal point key, press the 9 key, press the sign change (+/-) key, press the "sin" key.

(b) press the 1 key, press the decimal point key, press the 8 key, press the "cos" key, press the reciprocal (1/x) key.

John

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