What is the value of 3-(-2)

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

Prove the following(cot0+cosec0)[tex](cot0 + cosec0) { }^{2} = \frac{1 + cos0}{1 - cos0} [/tex]

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