3A angles ( Sin 3A , Cos 3A , tan 3A & proOF) || Important results || Examples

If sin A=(3)/(5), find cos A and tan A

If sin A+3cos A=0 ,then tan2A equals to

Examples:sin ^(3)x cos xdx

(sin A+sin3A)/(cos A+cos3A)=tan2A

Prove that (sin5A- sin3A)/(cos 5A +cos 3A)= tanA

If sin A=(3)/(4), calculate cos A and tan A

In a Delta ABC , if cosA cos B cos C= (sqrt3-1)/(8) and sin A sin B sin C= (3+ sqrt3)/(8) , then the respective values of tan A, tan B and tanC are

Use OF interval and illustration || Sin & Cos 18 degree , Sin & Cos 36 degree || Trigonometry identities with 3 angles and their derivation || Important Points

(sin x + sin 3x + sin 5x)/(cos x + cos 3x + cos 5x) = tan 3x

Prove that: (sinA - 2sin^(3)A)/(2 cos^(3)A - cosA) = tan A