if a=3 cos^2 thita ;and b=3sin^2thita +2; then find a+b
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a + b
→ 3 cos² Ө + 3 sin² Ө
→ 3 (cos² Ө + sin² Ө)
→ 3 (1) {cos² x + sin² x = 1}
→ 3
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