Question

If 3 cot A=4, chack weather 1- tan²A/1+tan²A = COS²A-sin²A or not​

Answer 1

Step-by-step explanation:

Given Cot A=4/3 Or B/P=4/3 Let B=4k and P=3k So in a right angle triangle with angle A P2 + B2 =H2 H=5k Now tan A=1/cot A=3/4 Cos A=B/H=4/5 Sin A=P/H=3/5 Let us take the LHS RHS = cos2 A - sin2A= 7/25 So LHS=RHS,so the statement is true

Answer 2

Refer the attachment please