PSRQ
tan 1˚ × tan 2˚× …………………….tan 88˚ × tan 89˚ = ?
sin2 9 ° + sin2 10 ° + sin2 11 ° + sin2 12 ° + ……… + sin2 81 ° = ?
...If sin(x + y) = 3/5 and cos(x - y) = 12/13, where x, y ∈ [0, π/2], find sin(2x) + sin(2y).
A man observes the top of a tower at an angle of elevation of 30°. He walks 100 meters closer to the tower, and the angle of elevation becomes 60°. If...
If sin θ = 3/5 and cos θ = 4/5, find the value of (2tan² θ + 3cot² θ).
What is the value of [(tan 5θ + tan 3θ)/4 cos 4θ (tan 5θ – tan 3θ)]?
If sin 23° = `12/13` , then tan 67° = ?
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