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sin2 7˚ + sin2 9˚ + sin2 11˚ + sin2 12˚ + ……… + sin2 83˚ = ?
If sin 28° = 15/17 , then tan 62° = ?
...If 4cos2x - 3 = 0, and (0° > x > 90°), then find the value of 'x'.
Find the simplified value of:
If tanθ – cotθ = a and cosθ + sinθ = b, then (b2 –1)(a2 + 4) = ?
Find the value of sin(θ) if 2sinθ = tanθ, for 0 < θ < 90°.
If (sinθ+cosθ)/(sinθ-cosθ) = 2, then the value of sin4 θ is
Find the value of `1/2` cosec 10 - `2/(cosec 70)` ?