Question
Which of the following numbers will replace the
question mark (?) in the given series? 85, 93, 77, 85, 69, 77, ?, 69Solution
The logic followed here is as follow: 85 + 8 = 93 93 - 16 = 77 77 + 8 = 85 85 - 16 = 69 69 + 8 = 77 77 - 16 = 61 61 + 8 = 69
If sin5A = cos(2A+20°), then what is the value of A? Given that 5A is an acute angle.
- If cot A = √3, then what will be the value of cosec⁴ A?

If tan A = 1, then what will be the value of sec² A + cosec² A?
Find the value of sin(θ) if 2sinθ = tanθ, for 0 < θ < 90°.
- If X = 15°, find the value of:
cos²(2X) + sin²(3X) - tan²(2X) Simplify (cos20°+sin 20°) /(cos20°-sin20°)
- Determine the value of :

Given that 'θ' is an angle less than 120 ° , what is the value of 'θ' if it satisfies the equation 3cos 2 θ = 2 + sin 2