Fill in the blanks:

1. If tan⁡x=2.5\displaystyle {\tan{{x}}}={2.5} then tan⁡(−x)\displaystyle {\tan{{\left(-{x}\right)}}} =  

2. If sin⁡x=0.6\displaystyle {\sin{{x}}}={0.6} then sin⁡(−x)\displaystyle {\sin{{\left(-{x}\right)}}} =  

3. If cos⁡x=0.6\displaystyle {\cos{{x}}}={0.6} then cos⁡(−x)\displaystyle {\cos{{\left(-{x}\right)}}}=  

4. If tan⁡x=−1.5\displaystyle {\tan{{x}}}=-{1.5} then tan⁡(π+x)\displaystyle {\tan{{\left(\pi+{x}\right)}}}=  

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