How to calculate the value of tan inverse 10 - tan^-1 10

In the given figure, if DEFG is a square, ∠ BAC = 90°. Then prove that DE² = BD × EC

In the given figure, chord ED is parallel to diameter AC of the circle with Center 'O'. If ∠ CBE = 65°, what is the value of ∠ DEC?

Solve the following equations:  sec²x = tan 2x

i have the doubt in Vlookup Comparison of the tables.

If two chords of a circle intersect within the circle, prove that the line joining the points of intersection to the centre makes equal angles with the chord.

Prove that: Each angle of a rectangle is a right angle.

drawing kis under group me ayega

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