Question

if 7sin^2 theta+3cos^2 theta=4, then show that theta=30 degree
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Answer 1

Answer:

7 sin^2theta + 3cos^2theta=4

Step-by-step explanation:

7sin^2theta + 3(1-sin^2theta) =4

7sin^2theta + 3 - 3sin^2theta =4

4sin^2theta = 4 - 3

sin^2theta =1/4

sin theta = 1/2

theta = 30°