also tell me these and again don't give useless answer please
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Step-by-step explanation:
Tan70=tan(50+20) Tan(50+20)=tan50+tan20/1-tan50.tan20 Tan70=tan50+tan20/1-tan50.tan20 Tan70 - tan70.tan50.tan20=Tan50+tan20(by cross multiple) We know tan70.tan20=1 So tan70-tan50=tan50+tan20 tan70=2tan50+tan20
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