class 10 maths chapter 9 some applications of trigonometry
Trigonometric ratios: In ∆ABC, ∠B=90°, for angle ‘A’ Reciprocal relations: Quotient relations: Identities: trigonometric ratios of some specific angles: Trigonometric ratios of complementary angles: sin(90°- θ) = cos θ ,cos(90°-θ) = sinθ;tan (90°-θ) = cot θ,cot (90°-θ ) = tan θ;sec (90°- θ) = cosec… Read More »class 10 maths chapter 9 some applications of trigonometry