Verify the identity.cos
= -sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= (cos x)(0) - (sin x)(1) = - sin x.
Mathematics
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Solve by the elimination method.x + y = 12x - y = -6
A. {(-3, 10)} B. {(3, 9)} C. {(2, 10)} D. No solution
Mathematics
Multiply using Napier rods.5 × 4567
A. 22,840 B. 45,670 C. 22,835 D. 22,830
Mathematics
A low pass filter has R = 18 Kê, C = 0.01 F, and Vin = 10 V. Find VO and IC at fCO.
a. IC = 0.39 mA, VO = 10.0 V b. IC = 1.82 mA, VO = 5.0 V c. IC = 1.82 mA, VO = 7.1 V d. IC = 0.39 mA, VO = 7.1 V e. IC = 0.56 mA, VO = 10.0 V
Mathematics
Calculate the number of distinguishable strings that can be formed with the stated letters.4 m's and 6 n's
A. 24 B. 670 C. 210 D. 10
Mathematics