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A soil pH of 6.5 – 7.5 is considered optimal for phosphorus availability. In this pH range, phosphorus is less likely to form insoluble compounds with iron and aluminum in acidic soils or with calcium in alkaline soils, making it more accessible for plant uptake.
In a right triangle ABC, angle B = 90°. If tan A = 3/4 and the length of the hypotenuse is 25 cm, find the area of the triangle.
What is the value of (4/3) cot2 (p/6) + 3 cos2 (150o) – 4 cosec2 45o + 8 sin (p/2)?
...If x = r sin A cos B, y = r sin A sin B and z = r cos A, then find x² + y² + z².
If tan θ = (2/√5), then determine the value of cos2 θ
What is the value of cos75°?
If cos θ + sec θ = √2, then the value of cos³ θ+ sec³ θ is:
cot 4˚ x cot 47˚ x cot 42.3˚ x cot 43˚ x cot 47.7˚ x cot 86˚= ?
If sec 4A = cosec (3A - 50°), where 4A and 3A are acute angles, find the value of A + 75.