Mathematics: Sam used his calculator to find cos 1.75. he wrote down cos 1.75 = .999. how could sam recognize that his answer is incorrect?

18/50= 36/100 = = = As a percentage: 36%...

Sam used his calculator to find cos 1.75. he wrote

dollaass17

09.03.2022

Step-by-step explanation:

Since π=3.14 and 1.75 should be half of π so cos(1.75) should be in the approximation of $\frac{\sqrt{2}}{2}$ or 0.7 .

Clearly Sam's calculator is in the degree mode since $cos(1.75^{\circ})$

is about and obviously, $\frac{{\pi}}{2}$ , So on the unit circle, it will be in the second quadrant.

Thus, cos(1.75) is negative.

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