Prove that : ( A + A)2 + ( A + A)2 = 7 + 2 A + 2 A

CBSE Class 10 Maths PYQ · Trigonometry · Prove Given Result · 3 Marks · July 2024 · Standard

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

1533 Marks · July 2024 · Standard
Prove that :
$(\sin A + \cosec A)^2 + (\cos A + \sec A)^2 = 7 + \tan^2 A + \cot^2 A$
Show SolutionHide Solution
LHS $= \sin^2A + \cosec^2A + 2 \sin A \cosec A + \cos^2A + \sec^2A + 2 \cos A \sec A$
$= 1 + 1 + \cot^2A + 2 + 1 + \tan^2A + 2$
$= 7 + \tan^2A + \cot^2A = RHS$
← Previous questionNext question →