If Zeba Were Younger by 5 Years | Square of Her Age is 11 More Than 5 Times Actual Age | THINK MATHS

Train Travels 360 km | 5 km/h More Saves 48 Min | Find Original Speed | THINK MATHS | R.K. Tyagi Sir

If (1+m²)x²+2mcx+c²−a²=0 has Equal Roots, Prove c²=a²(1+m²) | THINK MATHS | R.K. Tyagi Sir

The Roots of (b−c)x²+(c−a)x+(a−b)=0 are Equal, then... | THINK MATHS | R.K. Tyagi Sir

Solve for x: 1/(2a + b + 2x) = 1/(2a) + 1/b + 1/(2x) | THINK MATHS | R.K. Tyagi Sir

D is a Point on Side BC of △ABC such that BD/CD = AB/AC | Prove that AD is the Bisector of ∠BAC

O is Intersection of Diagonals AC & BD of Trapezium ABCD, AB ∥ DC | Prove PO = QO | THINK MATHS

If PQRS is a Parallelogram and AB ∥ PS, then Prove that OC ∥ SR | THINK MATHS | R.K. Tyagi Sir

DF Intersects AC of △ABC at E, E is Mid-Point of CA & ∠AEF=∠AFE | Prove BD/CD = BF/CE | THINK MATHS

Sides & Medians of Two Triangles are Proportional | Prove △ABC ∼ △PQR | THINK MATHS | R.K. Tyagi Sir

Basic Proportionality Theorem BPT | Thales Theorem Proof | THINK MATHS | R.K. Tyagi Sir

Prove 3(sin⁴θ+cos⁴θ)−2(sin⁶θ+cos⁶θ)=1 | THINK MATHS | R.K. Tyagi Sir

Given sin θ + 2cos θ = 1, Prove that 2sin θ − cos θ = 2 | THINK MATHS | R.K. Tyagi Sir

Prove tan³θ/(1+tan²θ)+cot³θ/(1+cot²θ)=secθ cosecθ−2sinθcosθ | THINK MATHS | R.K. Tyagi Sir

Prove tan θ/(1 − cot θ) + cot θ/(1 − tan θ) = 1 + sec θ cosec θ | THINK MATHS | R.K. Tyagi Sir

If cosec A + cot A = m, Show that (m² − 1)/(m² + 1) = cos A | THINK MATHS | R.K. Tyagi Sir

Prove (cos A − sin A + 1)/(cos A + sin A − 1) = cosec A + cot A | THINK MATHS | R.K. Tyagi Sir

Find the Value of (sin 30° + tan 45° − cosec 60°)/(sec 30° + cos 60° + cot 45°) | THINK MATHS

Geometrical Proof of sec 30° = 2/√3 | THINK MATHS | R.K. Tyagi Sir

If sec θ + tan θ = 5, Find All Six Trigonometric Ratios | THINK MATHS | R.K. Tyagi Sir

Two Special Reciprocal Identities | cosec θ ± cot θ & sec θ ± tan θ | THINK MATHS | R.K. Tyagi Sir

Prove that Radius r of a Circle Touching Sides of a Right Triangle is r = (a + b − c)/2

Prove that Opposite Sides of a Quadrilateral Circumscribing a Circle Subtend Supplementary Angles

O is the Centre of a Circle of Radius 5 cm, OT = 13 cm | Find AB | THINK MATHS

Triangle ABC Circumscribes a Circle of Radius 4 cm. BD = 8 cm, DC = 6 cm. Find AB and AC.

PQ is a chord of length 8 cm of a circle of radius 5 cm. Tangents at P & Q intersect at T. Find TP.

The lengths of tangents drawn from an external point to circle are equal.

The tangent at any point of a circle is perpendicular to the radius through the point of contact.