SOLUTION: Given that X is an acute angle and COS X = (2√5)/5, find tan (90-x)Given that X is an acute angle and COS X = (2√5)/5, find tan (90-x)

List of trigonometric identities - Wikipedia

SOLVED: Suppose θ is an acute angle of a right triangle. For each function, find the values of the remaining five trigonometric functions of θ. Round to four decimal places. tan θ

Unit Circle: Sine and Cosine Functions

Triangles, Trigonometry and Geometry – Maths From Nothing

If A and B are acute angles such that tan A=1/2,tan B=1/3 and tan A + B=tan A+tan B/1 tan A tan B,find A + B

Trig. Past Papers Unit 2 Outcome 3 - Mathsrevision.com

If x and y are acute angles such that sin x=dfrac{1}{sqrt{3}} and sin y=dfrac{1}{sqrt{10}}, prove that (x+y)=dfrac{pi}{4}

The_trigonometry_functions

R.D. Sharma Solutions Class 10th: Ch 5 Trigonometric Ratios MCQ

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Trigonometric ratios in right triangles (article)

Ex 3.2, 5 - If tan x = -5/12, find other five trignometric functions

SOLVED: The degree measure of an acute angle in a right triangle is x. If sin x = 2/3, determine if each of the following expressions is also equal to 2/3: cos