The right angle triangle is a very important and useful tool in sheet metal flat pattern development. Triangle rules state that the sum of all three angles in a triangle = 180°.If one angle = 90° then it is called a right angle triangle.If there is at least two known features of a right angle triangle than the whole triangle can be solved.TRIGONOMETRY MADE SIMPLE!THREE IMPORTANT BUTTONS ON YOUR CALCULATOR: sin cos tanIF A SIDE &AN ANGLE IS KNOWNSOLVE FORMULAS(E) D & BAtan D x B or(B ÷ tan E)(E) D & BCB ÷ cos D or(B ÷ sin E)(E) D & ABA ÷ tan D or(A x tan E)(E) D & ACA ÷ sin D or(A ÷ cos E)(E) D & CAsin D x C or(cos E x C)(E) D & CBcos D x C or(sin E x C) DE90 - D ED90 - EDo the following problems.1. If D = 30° and C = 4.024 what is A = _________2. If E = 60° and A = 2.012 what is C = _________3. If D = 30° and C = 4.024 what is B = _________4. If D = 45° and B = 2.500 what is A = _________
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