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I'm studying from the latest edition of Kaplan's and I'm at the chapter for light which involves a lot of trig such as inverses of tan, sin etc...
For the physics section in general, how am I supposed to do any kind of trigonometry calculations without a calculator?
	
		
			
		
		
	
				
			For the physics section in general, how am I supposed to do any kind of trigonometry calculations without a calculator?
