Question

If secA=5/4, verify that 3sinA-4sin3A/4cos3A-3cosA=3tanA-tan3A/1-3tan²A

Answer 1

Answer:

answer is 0 I hope this helps you

Answer 2

Answer:

Ok from sec = 5/4 we can find hypo = 5k, adj side = 4k and opp side = 3k where k is any positive no

now substituting these values in LHS and RHS we get RHS = LHS = 117/44