Thevalue of 8(sin12 o)(sin48 o)(sin54 o). Medium. View solution. >. View more. Click a picture with our app and get instant verified solutions. Click here👆to get an answer to your question ️ In any ABC , find sinA + sinB + sinC . Clickhere👆to get an answer to your question ️ Area of a triangle whose vertices are (a costheta, b sintheta), ( - a sintheta, b costheta) and ( - a costheta, - b sintheta) is. Area of triangle is Δ = 2 1 ∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣ a cos θ − a sin θ − a cos θ b sin θ b cos θ − b sin That's a scary equation with twelfth powers; let's focus on the other one. sin ^2 A + sin A - 1 = 0 sin A = 1/2 (-1 pm sqrt{5}) Only the positive sign is the sine of a real angle, sin A = 1/2(sqrt{5}-1) sin ^2 A = 1/4( 6 - 2 sqrt{5}) = 1/2(3- sqrt{5}) cos ^2 A = 1 - sin ^2 A = 1/2 (sqrt{5}-1) = sin A cos ^4 A = sin ^2 A = 1/2(3 - sqrt{5}) cos ^6 A = (1/2 (sqrt{5}-1))( 1/2(3 - sqrt{5 Clicka picture with our app and get instant verified solutions. Click here👆to get an answer to your question ️ Prove that sin^2 (A2) + sin^2 (B2) + sin^2 (C2) = 1 - 2sin (A2)sin B2)sin (C2) . Inany triangle ABC, prove by vector method. a sinA= b sinB = c sinC. Q. Prove by the vector method, the law of sine in trignometry: sinA a = sinB b = sinC c. Q. Prove by vector method : cos(A−B)=cosA.cosB+sinA.sinB. Q. cos(A+B)=cosAcosB−sinAsinB prove by vector method. Q. Prove the following trigonometric identities. 2cos⁡x sin⁡y = sin⁡ (x + y) - sin⁡(x - y) Law of sine Here A, B, C are vertices of Δ ABC a is side opposite to A i.e. BC b is side opposite to B i.e. AC c is side opposite to C i.e. AB Law of cosine Just like Sine Law, we have cosine Law What are Inverse Trigonometric Functions If sin θ = x Then putting sin on the right side dFtC.

sin a sin b sin c formula