Question

If 2 sin^2 theta - cos^2 theta = 2, then find the value of theta.​

Answer 1

Answer:

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Answer 2

Answer:

90 degree

Step-by-step explanation:

2sin^2theta -cos^2theta =2

2sin^2theta - (1-sin^2theta)=2 (since, sin^2theta +cos^2theta=1)

2sin^2theta-1+sin^2theta =2

3sin^2theta -1 =2

3sin^2theta =2+1

sin^2theta = 3/3

sin^2theta =1

(squaring both side)

sin theta =1

theta = 90 degree (sin 90 =1)

90 degree ans