G.RT.1.3
Use the definition of the trigonometric functions to determine the sine, cosine, and tangent ratio of an acute angle in a right triangle. Apply the inverse trigonometric functions to find the measure of an acute angle in right triangles.
Khan Academy ResourcesInverse trigonometric functions reviewIntro to inverse trig functionsTrigonometric ratios in right trianglesRight triangle trigonometry reviewTrigonometric ratios in right trianglesEvaluate inverse trig functionsSolve sinusoidal equations (basic)Relate ratios in right trianglesSolve for an angle in right trianglesTrig values of π/6, π/4, and π/3Right triangle trigonometry word problemsTrigonometric ratios in right trianglesSine equation algebraic solution setSine & cosine of complementary anglesUsing inverse trig functions with a calculatorDomain & range of inverse tangent functionTrig challenge problem: trig values & side ratiosRight triangle word problemCosine, sine and tangent of π/6 and π/3Triangle similarity & the trigonometric ratiosUsing complementary angles

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