# Tangent + cosine - math problems

#### Number of problems found: 49

• Q-Exam If tg α = 9.6, Calculating sin α, cos α, cotg α .
• Angle between lines Calculate the angle between these two lines: ? ?
• Cotangent If the angle α is acute, and cotan α = 1/3. Determine the value of sin α, cos α, tg α.
• Trigonometric functions In the right triangle is: ? Find the value of s and 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)
• 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?
• Road The angle of a straight road is approximately 12 degrees. Determine the percentage of this road.
• Sphere in cone A sphere of radius 3 cm describes a cone with minimum volume. Determine cone dimensions.
• EQL triangle Calculate inradius and circumradius of equilateral triangle with side a=77 cm.
• 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.
• Right angled triangle 3 Side b = 1.5, hypotenuse angle A = 70 degrees, Angle B = 20 degrees. Find its unknown sides length.
• Right triangle Calculate the length of the remaining two sides and the angles in the rectangular triangle ABC if a = 10 cm, angle alpha = 18°40'.
• Pentadecagon Calculate the content of a regular 15-sides polygon inscribed in a circle with radius r = 4. Express the result to two decimal places.
• Building The building I focused at an angle 30°. When I moved 5 m building I focused at an angle 45°. What is the height of the building?
• Ratio iso triangle The ratio of the sides of an isosceles triangle is 7:6:7 Find the base angle to the nearest answer correct to 3 significant figure.
• Diagonals of pentagon Calculate the diagonal length of the regular pentagon: a) inscribed in a circle of radius 12dm; b) a circumscribed circle with a radius of 12dm.
• Rectangle Calculate the length of the side GN and diagonal QN of rectangle QGNH when given: |HN| = 25 cm and angle ∠ QGH = 28 degrees.
• Regular n-gon Which regular polygon have a radius of circumscribed circle r = 10 cm and the radius of inscribed circle p = 9.962 cm?

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Tangent - math problems. Cosine - math problems.