Question

if 3 cos a = 4 sin a find the value of 4 cos^2 a - 3 sin^2 a+2

Answer 1

Answer:

87/25

Step-by-step explanation:

given tana=3/4

then cosa=4/5,sina=3/5

then the simplification is 4×16/25-3×9/25+2

64/25-27/25+2

37/25+2

87/25