Trigonometric Functions
Bihar Board · Class 11 · Mathematics
Most important questions from Trigonometric Functions for Bihar Board Class 11 Mathematics board exam 2026. MCQs, short answer, and long answer questions with marks.
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Sample Questions
In which quadrant is tan(x) positive?
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First Quadrant, Third Quadrant
tan(x) is positive in the first and third quadrants where sine and cosine have the same sign.
What is cos(-x)?
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cos(x)
The cosine function is an even function, so cos(-x) equals cos(x).
What is the radian measure of a complete revolution?
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2π
A complete revolution around a circle is 2π radians, which is equivalent to 360 degrees.
What is sin(π/2)?
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1
At π/2 radians (90 degrees), the sine function has a value of 1.
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