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Math
Math

The value of cos 180° is

The value of cos 180° is A 0 B 1 C -1 …
Math

The perimeter of a triangle ABC is 6 times the arithmetic mean of the sines of its angles. If the side b is 2, then the angle B is

The perimeter of a triangle ABC is 6 times the arithmetic mean of the sines of its angles. If the side b is 2, then the angle B is …
Math

If 3 × tan(x – 15) = tan(x + 15), then the value of x is

If 3 × tan(x – 15) = tan(x + 15), then the value of x is A 30 B 45 C …
Math

If the sides of a triangle are 13, 7, 8 the greatest angle of the triangle is

If the sides of a triangle are 13, 7, 8 the greatest angle of the triangle is A π/3 B π/…
Math

The value of tan 20 × tan 40 × tan 80 is

The value of tan 20 × tan 40 × tan 80 is A tan 30 B tan 60 C …
Math

If the angles of a triangle be in the ratio 1 : 4 : 5, then the ratio of the greatest side to the smallest side is

If the angles of a triangle be in the ratio 1 : 4 : 5, then the ratio of the greatest side to the smallest side is A …