Prove that 45° = 1 geometrically.

CBSE Class 10 Maths PYQ · Trigonometry · Find Angle of T-Ratio · 3 Marks · March 2025 · Basic

Solve it yourself first — then press or tap Show Solution. Use for previous / next question.

1733 Marks · March 2025 · Basic
Prove that $\tan 45^{\circ} = 1$ geometrically.
Show SolutionHide Solution
Consider an isosceles right $\Delta ABC$
Using angle sum property $\angle A = \angle C = 45^{\circ}$
Clearly, $\tan 45^{\circ} = \frac{AB}{BC} = \frac{x}{x} = 1$
← Previous questionNext question →