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Trigonometric Identities — Maths STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10MathsTrigonometric Identities1 Mark
MCQ
$\sin^230^\circ+4\cot^245^\circ-\sec^260^\circ=?$
  • A
    $0$
  • ✓
    $\frac{1}{4}$
  • C
    $4$
  • D
    $1$
✓

Answer

Correct option: B.
$\frac{1}{4}$
$\sin^230^\circ+4\cot^245^\circ-\sec^260^\circ$
$=\Big(\frac{1}{2}\Big)^2+4(1)^2-(2)^2$
$=\frac{1}{4}+4-4$
$=\frac{1}4{}$

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