# Cosine + sine - math problems

#### Number of problems found: 99

• Angles by cosine law Calculate the size of the angles of the triangle ABC, if it is given by: a = 3 cm; b = 5 cm; c = 7 cm (use the sine and cosine theorem).
• Sin cos tan In triangle ABC, right-angled at B. Sides/AB/=7cm, /BC/=5cm, /AC/=8.6cm. Find to two decimal places. A. Sine C B. Cosine C C. Tangent C.
• Right triangle trigonometrics Calculate the size of the remaining sides and angles of a right triangle ABC if it is given: b = 10 cm; c = 20 cm; angle alpha = 60° and the angle beta = 30° (use the Pythagorean theorem and functions sine, cosine, tangent, cotangent)
• Q-Exam If tg α = 9.6, Calculating sin α, cos α, cotg α .
• Cotangent If the angle α is acute, and cotan α = 1/3. Determine the value of sin α, cos α, tg α.
• Trigonometry If you know that cos(γ) = sin (806°), what is the angle γ?
• Trigonometric functions In the right triangle is: ? Find the value of s and c: ? ?
• Pentagon Calculate the area of a regular pentagon, which diagonal is u=16.
• Right Determine angles of the right triangle with the hypotenuse c and legs a, b, if: ?
• One side One side is 36 long with a 15° incline. What is the height at the end of that side? The angle of a straight road is approximately 12 degrees. Determine the percentage of this road.
• The cone The lateral surface area of the cone is 4 cm2, the area of the base of the cone is 2 cm2. Determine the angle in degrees (deviation) of the cone sine and the cone base plane. (Cone side is the segment joining the vertex cone with any point of the base c
• ABCD AC= 40cm , angle DAB=38 , angle DCB=58 , angle DBC=90 , DB is perpendicular on AC , find BD and AD
• Sphere in cone A sphere of radius 3 cm describes a cone with minimum volume. Determine cone dimensions.
• Chord - TS The radius of circle k measures 68 cm. Arc GH = 47 cm. What is TS?
• The aspect ratio The aspect ratio of the rectangular triangle is 13: 12: 5. Calculate the internal angles of the triangle.
• Triangle Calculate the area of ​​the triangle ABC if b = c = 17 cm, R = 19 cm (R is the circumradius).
• Right triangle A right triangle ABC is given, c is a hypotenuse. Find the length of the sides a, b, the angle beta if c = 5 and angle alfa = A = 35 degrees.
• Regular 5-gon Calculate the area of the regular pentagon with side 7 cm.
• Isosceles triangle 10 In an isosceles triangle, the equal sides are 2/3 of the length of the base. Determine the measure of the base angles.

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Most natural application of trigonometry and trigonometric functions is a calculation of the triangles. Common and less common calculations of different types of triangles offers our triangle calculator. Word trigonometry comes from Greek and literally means triangle calculation. Cosine - math problems. Sine - math problems.