Question

If 7sin^2A+3cos^2A=4,find tanA

Answer 1

7sin square thita +3cos square thita =4

4 sin square thita + 3sin square thita + 3cos square thita =4

4 sin square thita+3(sinsquarethita +cossquarethita)=4

4sin squre thita=1

sin thita=1/2

tan thita =1/root3