CBSE 11th Standard Maths Subject Trigonometric Functions HOT Questions 2 Mark Questions With Solution 2021
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CBSE 11th Standard Maths Subject Trigonometric Functions HOT Questions 2 Mark Questions With Solution 2021
11th Standard CBSE
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Reg.No. :
Mathematics
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If m sin\(\theta \) = n sin (\(\theta \) + 2\(\alpha \)), then prove that tan (\(\theta \) + \(\alpha \)) cot \(\alpha \) = \(\frac { m+n }{ m-n } \)
(a) -
In \(\triangle \)ABC, if a cos A=b cos B, show that the triangle is either isosceles or right angled.
(a) -
In a ΔABC, \(\frac { { a }^{ 2 }-{ b }^{ 2 } }{ { a }^{ 2 }+{ b }^{ 2 } } =\frac { \sin { \left( A-B \right) } }{ \sin { A+B } } \) , prove that it is either a right angled or an isosceles triangle.
(a) -
Prove that
\(tan\quad \theta \quad tan\quad ({ 60 }^{ o }-\theta )tan\quad ({ 60 }^{ o }+\theta )\quad =\quad tan\quad 3\theta .\)(a) -
If cos \(\alpha \) +cos \(\beta\) = 0 = sin \(\alpha \) +sin\(\beta\), then find the value of cos2\(\alpha \)+cos 2\(\beta\)
(a)