Math
The value of cos² x + cos² y – 2cos x × cos y × cos (x + y) is
The value of cos² x + cos² y – 2cos x × cos y × cos (x + y) is A sin (x + y) B sin² (x …
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Math
If a×cos x + b × cos x = c, then the value of (a × sin x – b²cos x)² is
If a×cos x + b × cos x = c, then the value of (a × sin x – b²cos x)² is A a² + b² + c² B …
Math
If cos a + 2cos b + cos c = 2 then a, b, c are in
If cos a + 2cos b + cos c = 2 then a, b, c are in A 2b = a + c B b² = a × c …
Math
In a triangle ABC, cosec A (sin B cos C + cos B sin C) equals
In a triangle ABC, cosec A (sin B cos C + cos B sin C) equals A 1 B c/a …
Math
If the angles of a triangle be in the ratio 1 : 4 : 5, then the ratio of the greatest side to the smallest side is
If the angles of a triangle be in the ratio 1 : 4 : 5, then the ratio of the greatest side to the smallest side is A …