u/Impossible-Paper9217

I don't know if this is widely known but, to find the hypotenuse using just a calculator, you just click shift and + which turns into Pol() and put your opposite comma adjacent for example: Pol[5(opposite), 15(adjacent)] it'll give you the hypotenuse and if you wanna find the angle in the hyp and adj you can just click RCL and then tan which gives you the angle.

I'm not sure if this is widely known but a cool hack nonetheless

This is a very cheap calculator that can be bought in the Philippines. I think this calculator is manufactured in china. This model work on 2 button cell, this model can do things such as angle unit conversion, regression calculations, memory calculations and memory calculations. The price in pesos is about 400 pesos which is less than 10 dollars.

In the left theres a series circuit containing 2 220 ohms resistors and also a 100 ohm resistor totaling about 540 ohms with a 9 volts battery which has a safe current for a red light emitting diode. On right, theres a parallel circuit that has both 1k ohms, totalling the resistance to 500 ohms using also a 9 volts battery which has a safe current for the red light emitting diode.

That's all I'm going to tell, thank you for reading. Edit: the 2 jumper wires connecting to the right are now placed on the left power bus

This is just a small calculator and actually costs less than a dollar, it's about 49 pesos from what I remember, pretty affordable