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The correct answer is D
tan 20˚ x tan 23˚ x tan 67˚ x tan 70˚ = ?
In ∆ABC, AB = 5cm, BC = 6cm and AC = 10cm then find out the value of cos A?
If sin θ and cos θ are the root of standard Quadratic Equation , then which of the following is true ?
1. a2 + b2 - 2ac =...
If 7sin² ϕ + 3cos² ϕ= 4, then find the value of ϕ ?
If (5sinx - cosx) = 2√2sinx, then find the value of 'tanx'
If A and B are complementary angles, then the value of-
sin A cos B + cos A sin B – tan A tan B + sec 2
Calculate the value of sec75o