Farmer with good mental and moral will have a good

102.89 of 3.08 = 59.98% of 499.94 + √?

Which of the given trigonometric identities is incorrect ?

1. tan² θ = sec² θ - 1B. cosec² θ = 1 + cot

(29.97%) of 9840 + ? + (45.17% of 1240) = (31.955% of 11750)

What approximate value will replace the question mark (?) in the following?

11.67 × 50.23 + ? = 14.88% of 600.44 + 9.66 × 8.27² 

11.89 × 2.10 × 4.98 × 4.03 ÷ 7.98 of 15.03 = ?

What approximate value will come in place of question (?) in the following given expression? You are not expected to  calculate the exact value.