If 2 sin^2A - cos^2A = 2, then find the value of A.
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Answered by
8
Answer: A = 90
Step-by-step explanation:
2sin² A-cos^2A = 2
2(1 - cos^2A) - cos^2A = 2
2 - 2cos^2A - cos^2A = 2
2 - 3cos^2A = 2
3cos^2A = 0
cos^2A = 0
cosA = 0
cos 90 = 0
A = 90
Answer- Value of A is 90.
Answered by
0
2 sin^2A - cos^2A = 2
2 sin^2A - (1 - sin^2A) =2
2 sin^2A -1 + sin^2A=2
3 sin^2A=3
sin^2A=1
sin A=1
thus,
A =90
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