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已知\sin\alpha={2\over3},则\cos(\pi-2\alpha)=___。相关知识点: 试题来源: 解析 -{1\over9} 本题主要考查二倍角的余弦公式。 因为\sin\alpha={2\over3},则\cos(\pi-2\alpha)=-\cos2\alpha=-(1-2\sin^2\alpha)=-{1\over9}。 故本题正确答案为-{1\over9}。反馈...
sin(nπ) 关于n 的微分 πcos(πn) 求值 sin(πn) 测验 Trigonometry sin(nπ)
I suppose it's linked above already, but in scipy/scipy#18382, np.cos(np.pi) != -1. 😕 1 larrybradley mentioned this pull request Apr 28, 2023 Fix rectangle rotation corners test due to numpy sin/cos changes astropy/regions#503 Merged Contributor mhvk commented Apr 29, 2023 ...
Plot the sine function over the domain−π≤x≤π. x = -pi:0.01:pi; plot(x,sin(x)), gridon Sine of Vector of Complex Angles Calculate the sine of the complex angles in vectorx. x = [-i pi+i*pi/2 -1+i*4]; y = sin(x) ...
The domain of the function cos^(-1)(2x-1) is 01:21 The domain of the function defined by f(x)=sin^(-1)sqrt(x-1) is 02:05 If cos(sin^(-1)""3/5+cos^(-1)x)=0, then x is equal to 01:17 The value of cos^(-1)(cos""(3pi)/2) is equal to 01:52 The value of...
The domain of the function defined by f(x)=sin^(-1)sqrt(x-1) is 02:05 If cos(sin^(-1)""3/5+cos^(-1)x)=0, then x is equal to 01:17 The value of cos^(-1)(cos""(3pi)/2) is equal to 01:52 The value of expression 2sec^(-1)2+sin^(-1)(1/2) is 01:51Exams...
Over- expression of Swiprosin-1 in the immature B-cell line WEHI231 enhanced spontaneous and BCR-induced apopto- sis. In contrast, shRNA-mediated silencing of Swiprosin-1 suppressed apoptosis following BCR ligation. Finally, Swiprosin-1 regulated net cell growth of WEHI231 cells through ...
Plot the sine function over the domain−π≤x≤π. x = -pi:0.01:pi; plot(x,sin(x)), gridon Sine of Vector of Complex Angles Calculate the sine of the complex angles in vectorx. x = [-i pi+i*pi/2 -1+i*4]; y = sin(x) ...
Example 3– Combining the SIN and the PI Functions for Angles in Degrees Steps: Select C5 to store the result. Enter the following formula in C5: =SIN(B5*PI()/180) within the cell. Press ENTER. Drag down the Fill Handle to see the result in the rest of the cells. This is the ou...